Features
Meeting the national vegetable oil demand: Can Madhuca (‘Mee’) oil contribute?
by Dr Parakrama Waidyanatha
The President, earlier this year, regrettably and without an in- depth examination of issues at stake, decided to ban import of palm oil totally, and expand the cultivation of coconut to meet the total local vegetable oil demand. It was also decided to uproot the existing oil palm cultivations amounting to some 12,000 hectares. The ‘grapevine’ suggests he was misguided by a former chairman of a coconut institution, that his wife died of cancer having consumed palm oil, that lead him to this decision! The President should have consulted the Coconut Research Institute and other experts in the field before rushing into such a decision. There is no published research evidence supporting an oil palm- related cancer risk.
However, within weeks the government was forced to retract from banning palm oil and the associated gazette notification following objections from the Ambassadors of Malaysia and Indonesia, two countries we import palm oil from. Their concern obviously would have been the wrong impression given, by the ban, to the world at large about palm oil, apart from a possible reprisal by the two countries by way of banning import of garments from Sri Lanka. Imported palm oil accounts for 74% of our current total vegetable oil supply, whereas the local coconut oil production satisfies a mere 13%; and we also import 11% of our coconut oil needs Table 1). So the local coconut production can never meet our total vegetable oil demand.
The ban also instigated ‘Solidaridad’, an international civil society organization operating across five continents, striving, amongst other things, for fair trade and agricultural production that respects people and the planet, to launch a study on the local palm oil ban, reasons for it, and its consequences on the local vegetable oil availability. A report, in fact a book, under the aegis of this organization written by local and foreign experts in the relevant subjects is to be launched on January 19, 2022.

Potential for expanding coconut cultivation
There is no comprehensive study on the actual land available for expansion of coconut cultivation. A Coconut Research Institute study based on soil maps reveal the total extent suitable for coconut including the extent already in coconut to be about 1. 86 million ha; the current extent being about 470,000 ha. How much of that land is physically available for coconut is not known; and even if a part of it is available the question is whether the landowners would use it for coconut cultivation or other purposes. Furthermore, global warming and associated weather changes can seriously constrain coconut growing in the Intermediate and Dry Zones.. A recent finding of the CRI is that increased ambient temperatures in the dry zone, especially during dry periods, inhibit pollen germination leading to poor fruit set, limiting the potential for expansion of coconut cultivation in the area.
On the other hand, of the total paddy cover of 158,000 hectares in the wet zone some 57,000 ha are left fallow.. On the whole, cultivation of paddy in the wet zone is uneconomic as evident from the Table 2, largely because of increasing input costs, especially fertilizer and labour, and poor yields.
It is therefore worth considering cultivation of coconut, oil palm or other suitable crops such as vegetables in those soils, after draining them, and collecting the water in ponds at the bottom of the slope for fish culture.
On the other hand, the potentiality of growing coconut in tea as a shade crop too should be explored, as seen in the picture below, and many tea growers in the wet zone are already resorting to it. However, coconut can be planted in tea only with new or replanting of the tea. Therefore, only limited tea lands should be theoretically available at the current replanting rate of 1% or less.

Coconut as our oil crop
Until about the late 1980s, the coconut production was adequate for our culinary consumption vegetable oil demand, even with a substantial share of it being value added and exported. However, over the years, the demand for conventional coconut oil declined and was replaced by the increasing demand for desiccated coconut, virgin coconut oil, coconut cream, coconut milk and milk powder (Table 3)
So the government must not impose a policy of growing coconut for oil only but promote coconut cultivation and allow profits and demand determine which coconut products should be produced.
Madhuca, a multipurpose but underutilized crop
Madhuca longifolia (Mee) is a multipurpose crop, also called ‘Honey Tree’ and ‘Butter Fruit Tree’ with much value as an oil and medicinal crop. Its leaves, flowers, bark and seeds are used in numerous aurvedic treatments. Flowers are used to treat chronic bronchitis and eye diseases; a mixture of flowers and milk is claimed to help in curing impotency and general debility. The flowers are also widely used in the manufacture of liquor as well as different types of food products. Also, the juice of flowers is used to cure many skin diseases. Decoctions prepared from the bark are said to be effective against diabetes. Seed oil is edible and is also used in the treatment of chronic constipation and piles and it also acts as a laxative. Leaves of Madhuca are used in the treatment of eczema.
It is a tropical and sub-tropical tree growing in several Asian and Australian forests and is also cultivated by villagers in some parts of India. Another species Maduca indica appears to be more popular in India, and its oil is also used amongst other things as a biofuel but not much as a dietary oil unlike that of M. longifolia. Both species also called ‘Mahua’ are widely grown in Uttar Pradesh, Madya Pradesh, Gujarat, South India, in three district of Karnataka and monsoon forests of Western Ghats. They flower and fruit by about the 10th year, and about 50-100kg of flowers are produced per season per tree.

Madhuca oil
Madhuca longifolia (Mee) oil has been consumed as an edible oil from antiquity in Sri Lanka and many other countries, apart its numerous other uses as an aurvedic drug. It has also been used for lighting oil lamps. No formal plantings are available locally as far as the writer knows. Fruits from scattered trees especially in the dry zone are collected and seeds used for making oil. It grows in many parts of the dry zone, especially along river banks. Notably, Madhuca has an oil yield potential more than thrice the national coconut oil yield. Probably with varietal selection and genetic improvement, it should be possible to increase yields further. The tree can also be vegetatively propagated.
The oil has a very healthy fatty acid composition, closer to olive oil than coconut or palm oil (Table 4). The high saturated fatty acid composition of coconut has been implicated in the causation of coronary heart disease. In that context, apart from the much higher yield, the high monounsaturated fat content(46%) of Madhuca makes it more heart-friendly in that whereas saturated fatty acids increase both the good (HDL) and bad (LDL) cholesterols, monounsaturated fatty acids increase the good cholesterol and is reported to decrease the bad one.
Thus given the limitations of growing coconut in the dry zone, the higher potential yield of Madhuca and its excellent fatty acid composition, it is potentially a far better crop for expanding in the dry zone. The government should take immediate action to establish a research project, ideally under the Coconut Research Institute to study the potential for its cultivation and uses.

Concluding remarks
Coconut cultivation should certainly be expanded as far as possible as it is a multi-purpose crop. It is a major component in the Sri Lankan diet and has a high demand for value added products. However, its promotion and cultivation expansion should not merely be for oil but based on value added product demand and prices.
At the same time given the massive palm oil demand for consumption as a dietary oil and in many other value added products (Table 2),and costing the country Rs 37 billion annually for its imports, expansion of its cultivation too should be promoted, both in the plantation sector and as a smallholder crop. The farmers should be given the option of crop choice given its far greater returns than from tea, coconut or rubber.
A serious concern has been the declining tea yields, and the some of the low yielding tea lands in the wet zone as also unproductive rubber lands should ideally be converted to oil palm apart from abandoned paddy fields. Oil palm is the highest oil yielding oil crop in the world, yielding on average about four tons per hectare as against less than one ton/ha for soya bean and coconut, and giving far higher returns than any other plantation crop. Sri Lanka should target cultivating in at least about another 50,000 ha of oil palm, engaging also smallholders, as it happens in Malaysia and Indonesia to meet our vegetable oil demand. Reports reveal far higher income earning by them and vastly improved livelihoods as against other plantation crop smallholders.
Concurrently, serious consideration should be given for development of formal cultivations of Madhuca both as an oil and medicinal crop given its vast potential, as happens in India. Ideally dry zone lands should be targeted given the limitations of coconut cultivation in those lands as stated above.
Features
Nourishing the roots: Tackling malnutrition in Sri Lanka’s tea country
By Prof. M.W. Amarasiri de Silva
Malnutrition in Sri Lanka’s tea-producing regions represents a significant public health challenge. Defined as a state where an individual’s dietary intake does not meet their nutritional needs, malnutrition can manifest in various forms, including undernutrition and micronutrient deficiencies. Addressing malnutrition is crucial, particularly in vulnerable communities like those within the tea plantations, where socioeconomic factors compound the problem. These areas are home to marginalised populations that have historically faced barriers to essential services, resulting in alarming rates of malnutrition, especially among children.
The tea plantations of Sri Lanka not only contribute to the country’s economy but also reflect deep-rooted social inequalities. Many families rely on these plantations for their livelihoods, yet they often struggle with inadequate access to nutritious foods, further exacerbating their health issues. With alarming statistics indicating a high prevalence of underweight, stunting, and wasting among children, immediate action is necessary to reverse these trends.
Understanding the current state of malnutrition, especially within these tea communities, is vital to developing effective interventions. As the dietary landscape changes, traditional practices clash with the rise of unhealthy processed foods, leading to a complex cycle of malnutrition. This interplay lays the groundwork for exploring the current state of malnutrition in Sri Lanka’s tea country, where the urgent need for comprehensive solutions is clearer than ever.
Current state of malnutrition
The current state of malnutrition in Sri Lanka’s tea plantation communities reveals concerning statistics that highlight the severity of the issue. Reports indicate that around 35.6% of children, between the ages of 01 and 15, are classified as underweight, while 26.9% experience stunting, and 32.9% face wasting. These figures starkly contrast with national averages, suggesting that children in these areas suffer more acutely from nutritional deficiencies compared to their counterparts in other regions of the country. The high rates of undernutrition not only reflect immediate health risks but also indicate long-term consequences for child health, including impaired cognitive development, reduced academic performance, and increased susceptibility to chronic diseases later in life.
The prevalence of stunting and wasting is particularly alarming, as these conditions can hinder children’s growth and development, affecting their physical and mental well-being. This situation is compounded by the rise of cheap, processed foods that are easily accessible but nutritionally inadequate. As the dietary patterns shift, families often struggle to maintain traditional dietary practices that could provide necessary nutrients.
Understanding these statistics and their implications leads naturally to a closer examination of the socioeconomic factors that contribute to malnutrition. These underlying influences, such as income levels, education, and access to healthcare, are key to addressing the challenges faced by these vulnerable communities and developing effective interventions.
Socioeconomic factors influencing malnutrition
The socioeconomic factors influencing malnutrition in Sri Lanka’s tea plantation communities are intertwined with various dimensions of daily life, including employment, income, and education. Maternal employment plays a critical role in shaping nutritional outcomes, as many mothers in these communities are engaged in labour-intensive jobs that demand long hours and provide little flexibility. This often limits their ability to prepare nutritious meals at home or attend to their children’s dietary needs, resulting in increased risks of malnutrition among their children.
Household income is another significant factor. Many families in the plantations depend on seasonal wages, which can lead to periods of financial instability. Low incomes constrain access to diverse and healthy food options, forcing families to rely on cheaper, unhealthy alternatives that can exacerbate nutritional deficiencies. Consequently, these economic pressures create a cycle of poor health and limited opportunities for better livelihoods.
Education levels within these communities also contribute to malnutrition. Limited educational attainment restricts awareness of nutrition and healthy dietary practices. Parents who lack knowledge about balanced diets may not prioritise essential nutrients for their children, further deepening the cycle of undernutrition and its long-term consequences.
Understanding these socioeconomic challenges requires a look back at the historical context of tea plantations in Sri Lanka. The legacy of colonialism and economic marginalisation continues to shape the lives of plantation workers today, affecting their access to resources, education, and opportunities for improving their health and nutrition.
Historical context of tea plantations
The historical context of tea plantations in Sri Lanka reveals a complex interplay of colonial legacy, social isolation, and economic disparity that continues to shape the lives of local communities. Initially established during British colonial rule, tea plantations relied on imported labour, primarily from South India, creating a workforce that was segregated from both the local populations and urban centres. This separation fostered social isolation, restricting access to essential services, such as healthcare and education, which are crucial for nutritional well-being.
Over generations, the descendants of these labourers have faced enduring economic disadvantages. The plantation system, designed to maximise profit for colonial interests, often left workers with meager wages and poor living conditions. This economic hardship is a significant factor contributing to malnutrition, as families struggle to afford nutritious food. The reliance on a narrow selection of low-cost, processed foods has intensified nutritional deficiencies, leaving many communities vulnerable to a range of health issues.
The transition from traditional diets to reliance on cheaper, unhealthy options illustrates how historical conditions have impacted dietary practices. Today, this has resulted in a triple burden of malnutrition, where undernutrition, micronutrient deficiencies, and diet-related diseases coexist. Understanding this historical backdrop is vital for addressing current malnutrition challenges, highlighting the need for interventions that consider both the past and present of these communities.
Triple burden of malnutrition
The triple burden of malnutrition in Sri Lanka’s tea country refers to the coexistence of undernutrition, micronutrient deficiencies, and diet-related noncommunicable diseases. This term encapsulates the various dietary challenges faced by communities where traditional food practices are increasingly overshadowed by modern, processed food options. As these communities have shifted from nutrient-rich diets to cheaper, less healthy alternatives, they encounter unique health implications.
Children, in particular, suffer from this transition. The alarming rates of undernutrition among young ones not only lead to immediate health risks but also hinder long-term development, impacting cognitive abilities and future productivity. Moreover, the intake of processed foods often lacks essential vitamins and minerals, contributing to deficiencies that can have lasting effects on growth and immunity. Concurrently, the rise of diet-related diseases, such as obesity and diabetes, presents a growing concern, often linked to a sedentary lifestyle and poor eating habits.
Understanding the triple burden is essential for crafting effective community-based interventions. By addressing dietary challenges through localised strategies, such as promoting nutritious food options and educational programmes, health practitioners can help shift behaviours and improve health outcomes. This focus on community engagement is vital for creating sustainable change and overcoming the barriers that have historically limited access to healthy foods in these marginalised areas.
The next step involves exploring specific community initiatives that can promote better nutritional practices and empower local families.
Community-based interventions and initiatives
Community-based interventions and initiatives are crucial in addressing malnutrition in Sri Lanka’s tea plantation communities. These programmes depend significantly on the involvement of Community Development Officers (CDOs) and Plantation Family Welfare Officers (PFWOs), who are essential in fostering local engagement. Through targeted training programmes, these community leaders acquire the knowledge and skills necessary to promote better nutritional practices.
The training emphasises hands-on cooking techniques and the importance of using locally available foods, enabling CDOs and PFWOs to act as educators within their communities. They organise workshops that create spaces for collective learning and sharing, which is essential in building trust and collaboration among families. This communal approach not only disseminates nutritional knowledge but also strengthens community ties, making it easier for families to adopt healthier eating habits.
Engagement strategies play a vital role in the success of these initiatives. By involving community members in the planning and execution of programmes, the initiatives become more relevant and culturally appropriate. This grassroots involvement fosters a sense of ownership and accountability, encouraging families to prioritise nutrition in their daily lives.
As these local leaders gain momentum in their efforts, it becomes evident that sustainable improvements in health and nutrition are possible through community-driven actions. Looking ahead, the emphasis must shift towards consolidating these grassroots efforts and exploring how to institutionalise support systems that enhance the impact of community interventions.
Conclusion and future directions
Addressing malnutrition in Sri Lanka’s tea plantation communities requires a comprehensive understanding of the unique challenges faced by these populations. Key findings highlight alarming rates of undernutrition, with many children suffering from conditions such as stunting and wasting. Socioeconomic factors, including low incomes and limited access to education, compound these issues, creating a cycle of poor health and wellbeing.
Sustainable approaches to improving nutrition are essential for long-term success. Empowering local leaders, such as Community Development Officers and Plantation Family Welfare Officers, has proven effective in promoting better dietary practices. Their grassroots initiatives foster trust and engagement within communities, making it easier to introduce healthier food options and nutritional education.
Future policy recommendations should focus on expanding these community efforts. This includes integrating nutritional education into health staff training, promoting organic farming, and regulating the availability of unhealthy processed foods. Additionally, enhancing access to nutrition information through digital platforms can help bridge knowledge gaps and support healthier choices.
Ultimately, the path forward lies in ensuring that local communities are equipped with the knowledge and resources needed to make sustainable changes. By prioritising these strategies, Sri Lanka can tackle malnutrition effectively, paving the way for healthier futures for its tea plantation residents.
Features
After the parade: What a traffic OIC’s walk-out tells us
by Mahil Dole
Senior Superintendent of Police (Retd.);
former Member, Sri Lanka Wakfs Board
On 03 September. 2026. the Sri Lanka Police marked 160 years with the full ceremonial apparatus of the State. At the Field Force Headquarters, in Thimbirigasyaya, President Anura Kumara Dissanayake received a guard of honour, a commemorative stamp was presented, long-service promotions were conferred, and a new mobile application and website were unveiled. He promised a new uniform by mid-2027, a risk allowance, a proper promotion scheme, official housing, vehicles, a modern headquarters, and approval to recruit 10,000 officers. He also warned that officers who can be purchased by the underworld should leave the uniform. It was a day of history, optics and declared intent.
Two days later, the Officer-in-Charge of the Traffic Division, at Dehiwala Police Station, made an entry in the routine information book, left his post and went home. He wrote that he could no longer cope with the workload and the pressure of the job. Mount Lavinia Division SSP Ashoka Gunasekara ordered the Crimes Investigation Bureau to inquire. Statements were recorded from the Inspector and the supervising ASP after advice from the Police Legal Division. The SSP’s reported worry was not only the officer’s welfare. It was precedent: that other traffic officers might follow.
That reflex is understandable. A disciplined force cannot treat walking off a post as ordinary industrial action. An OIC holds keys, files, exhibits, court dates and daily command of men and women on the road. Desertion of duty, even when dressed as despair, is a breach. But if the inquiry stops at the man and the entry in the book, the service will have treated a symptom as if it were the disease. The episode is not interesting because one Inspector lost his nerve. It is interesting because the nerve was lost in the same week the State spent public money and presidential time announcing that a new police service is being built.
The numbers behind the pageant
The Sri Lanka Police is not a decaying relic. It runs some 609 stations across 47 territorial and 78 functional divisions. In the past two years it has recorded the largest narcotics seizures in recent memory, more than five tonnes of heroin, nearly 10 tonnes of crystal methamphetamine, tens of tonnes of Kerala cannabis, and more than 16 million tablets, and has brought armed fugitives home from abroad. That record is real.
The same institution is running on a deficit no parade can conceal. Police Headquarters has acknowledged more than 30,000 vacancies, on some official reckonings closer to 32,000. Since 2020 more than 4,300 officers have left. Departures peaked in 2025 and remained high through the first half of 2026. Thousands more are due to retire in the next two years.
Applications have thinned as young people look overseas and serving officers leave early for work that pays better and humiliates less. Approval to take in 10,000 recruits is not trivial. It is also not a cure. A force that loses about two thousand people a year and starts 30 thousand short cannot be restored by a single intake, especially if training, housing and supervision cannot absorb newcomers without breaking them.
The President was right to say that officers work 12- to 18-hour stretches. Traffic OICs in the Colombo suburbs live inside a particular version of that grind. Dehiwala sits on one of the island’s most congested corridors. It absorbs school runs, funerals, political motorcades, night-time drunk driving and a motoring public that treats lane markings as optional. Accident files multiply. Court lists lengthen. Every fatal crash must be walked through the Magistrate’s Court, the JMO, insurers and grieving families. The same officer is then pulled into VIP movements, festivals, flood deployments, elections and the expanding list of “other duties” that have little to do with traffic law and everything to do with the State’s habit of using the police as a general-purpose labour pool. Firearm offences and narcotics have not stood still while traffic thickened. A single video of an officer losing his temper on Galle Road travels farther in an hour than a year’s worth of quiet competence. The public sees the outburst. It rarely sees the 16th hour.
The household the uniform does not protect
Work pressure is only the official half of the story. The unofficial half is the household. A constable’s or inspector’s pay still does not absorb the cost of living without anxiety. Quarters are scarce, often poor, and frequently far from the station. A sudden transfer turns schooling into a private crisis. Medical bills, tuition and the small humiliations of falling behind civilian neighbours accumulate. Job security, once the great consolation of the service, feels thinner when overseas markets offer an exit and a disciplinary file, sometimes necessary, sometimes political, can end a career in a week.
Teachers, nurses and soldiers carry their own weights; the police have never had a monopoly on hardship. What is distinctive is the bargain the State still recites and no longer quite honours. In harder years the compact was simple and was taught as S.S.S.: loyalty to the State, the Service and the Superior. That instruction was never a one-way street. It assumed a Superior who would not spend subordinates as disposable hours; a Service that would shield its own from avoidable misery; and a State that would not treat the policeman as both first responder and last resort for every failure of other institutions. When the roster is left to rot, when quarters and schooling are treated as private inconveniences, and when an officer’s first public mention after distress is “precedent,” the compact is already broken. Pageantry cannot put it back together.
Trust from top to bottom is what is fraying. Juniors already hear the message when welfare is announced at an anniversary and felt only as a circular months later, and when promotions stall for years before arriving in a ceremonial bundle. Loyalty cannot be drilled into people who no longer believe the institution will stand behind them when the file, the politician, the video or the debt collector arrives.
Discipline is not denial
An inquiry into the Dehiwala OIC is in order. The information book is an official record; walking off a post has consequences; other officers will watch what happens next. If the Inspector was in genuine distress, the professional response is medical and administrative support, not a theatrical charge designed to frighten the traffic branch. If misconduct is mixed with the distress, deal with the misconduct without using it to bury the distress. The worst outcome would be a finding that treats the episode as a one-man failure of character. Character is not irrelevant. It is not a staffing plan.
Sri Lankan policing already knows what happens when exhaustion is ignored: suicides after double shifts, public confrontations that began as fatigue, quiet desertions that never made the papers. Burnout studies here are not new. They describe too much demand, too little recovery and too little support from above. Research and Development does not need a five-year consultancy to discover this. It needs permission to say it in language headquarters cannot file away.
Immediate, short and long
Immediate measures are unglamorous. Audit actual hours at traffic divisions in the Western Province and cap them. Stop treating leave as a favour. Put a working counselling line in every division that an Inspector can use without becoming a case for the Legal Division. Temporary reinforcement of Dehiwala and similar corridors would cost less than another viral incident. Publish, internally, a simple rule: an officer who records distress in the information book is first a welfare case, then, if needed, a disciplinary one.
Short-term measures are already half-promised and must be made real on a calendar, not a podium. Stagger the 10,000 recruits so trainers and barracks are not overwhelmed. Let the risk allowance reach the constable on the road. Weigh schooling years in transfers. Treat quarters as operational infrastructure.
Reorganise court duty so the same handful of officers are not living in Magistrate’s Courts while the road goes unsupervised. Use the new app and cameras to cut paperwork, not to add another layer on top of the old books.
Long-term measures are political, which is why they are postponed. The police cannot remain the residual employer of every State anxiety — drugs, school gates, temple crowds, politician security, disaster relief and traffic. Some of those tasks belong to other agencies, or to a properly staffed traffic police with its own career path and rest rules. The President’s warning about purchasable uniforms was necessary, but integrity campaigns fail when the honest officer is the poorest man in the room.
None of this requires sentimentality. The public has reasons for anger: corruption cases, rough handling, political servility, the officer mysteriously unavailable until a call from above. Those failures are part of the same story. An understaffed, poorly housed force is easier to buy, easier to bully and quicker to snap. Reform that only lectures the ranks on ethics while leaving the roster untouched is not reform. It is a speech.
What the week actually said
The 160th anniversary was entitled to its dignity. A service that has buried officers in war, tsunami, pandemic and ordinary crime has a right to stand in formation and be thanked. Promises of uniforms, allowances and buildings are not empty if they arrive. But a uniform does not shorten a shift, an app does not find a school for a transferred child, and a commemorative stamp does not sit with an OIC at midnight while the next accident file is opened.
The Dehiwala Inspector may be right or wrong in the particular. That is what the inquiry is for. The conditions he pointed to are not in dispute: cadre shortfall, thinning applications, thin welfare, long hours, growing crime, traffic and court work, and daily media humiliation. Trust between the top and the bottom is weaker than the anniversary photographs suggest.
If Research and Development is good for anything this month, it should take the entry in that information book as a research question, not a disciplinary exhibit: actual weekly hours of traffic OICs in the Western Province, vacancy rates on those rosters, applications for early release or overseas no-pay, and access to counselling that is not a rumour. The answers will be uncomfortable. They will be more useful than another circular on loyalty.
S.S.S
. still has a meaning. Loyalty to the State requires a State that does not consume its own guardians. Loyalty to the Service requires a Service that tells itself the truth between parades. Loyalty to the Superior requires superiors who are alarmed by exhaustion, not only by precedent. The Inspector who went home from Dehiwala did not invent the pressure. He only wrote it down. The test of the next year is whether the men who stood on the saluting dais on 03 September are prepared to read that sentence as an order of the day.
Mahil Dole, SSP (Retired), is the former Head of the Counter-Terrorism Division of the State Intelligence Service and a former Director of the Police Special Branch.
Features
The art of the empty plate: Some medical aspects of periodic fasting
by Dr B. J. C. Perera
MBBS(Cey), DCH(Cey), DCH(Eng),
MD(Paediatrics), MRCP(UK), FRCP(Edin),
FRCP(Lond), FRCPCH(UK), FSLCPaed, FCCP,
Hony. FRCPCH(UK), Hony. FCGP(SL)
Specialist Consultant Paediatrician and Honorary Senior Fellow,
Postgraduate Institute of Medicine,
University of Colombo, Sri Lanka.
An independent freelance medical correspondent.
Could the spectacle of taking timed breaks from eating be the missing link to human health, or is it another fad or just a fleeting modern craze? Let us see the scientific picture and arrive at an evidence-based guide to how planned fasting works, its distinct styles, the proven benefits, and the essential safety guidelines.
In a culture accustomed to round-the-clock snacking, late-night refrigerator and kitchen raids, and endless food delivery apps, the concept of voluntarily abstaining from food can sound rather counterintuitive and radical. Yet, periodic fasting has evolved from an ancient spiritual ritual into one of the most rigorously researched health interventions of modern medicine. Over the past two decades, the medical fraternity of cardiologists, endocrinologists, and neuroscientists has shifted their gaze from what we eat to when we eat. Medical research has demonstrated that giving the digestive system structured pauses can trigger a cascade of cellular repair mechanisms, refine metabolic efficiency, and support long-term vital health.
However, voluntary fasting is not a single, one-size-fits-all prescription. From daily eating windows to multi-day fasts, the approaches vary widely in intensity, suitability, and clinical impact. Presented here is a comprehensive look at what happens inside the body when you fast, the primary methods available, the science-backed benefits, the potential drawbacks, and who should or should not give it a try.
The Biology Behind the Break: What Happens When You Fast?
To understand why fasting works, it helps to view the human body as a hybrid vehicle capable of running on two distinct energy sources: glucose (sugar derived from carbohydrates) and ketones (fatty acids broken down from stored body fat).
When you eat regularly throughout the day, your body constantly secretes the hormone insulin from the organ pancreas to transport glucose into your cells for immediate energy or store it in the liver and muscles as glycogen. As long as insulin levels remain elevated, your body stays in “storage mode,” rarely needing to tap into its long-term fat reserves. When you refrain from food for several consecutive hours, insulin levels drop significantly. Once the body exhausts its readily available liver glycogen reserves, typically after 12 to 16 hours of fasting, it reaches a metabolic turning point known as the metabolic switch. The liver begins converting stored body fat into ketones, shifting the body into a “burning mode.”
Beyond burning fat, extended periods without food trigger a fundamental cellular maintenance process called autophagy, derived from the Greek words for “self-eating“. During autophagy, cells clean the house, recycling damaged proteins, clearing out useless cellular debris, and stimulating mitochondrial regeneration; mitochondria being the multi-functional powerhouses of cells. Think of it as your body’s internal spring-cleaning service, which remains largely dormant when energy is constantly coming in.
The Main Types of Fasting: Methods and Their Pros and Cons
Periodic and intermittent fasting encompass several distinct protocols. Choosing the right pattern depends entirely on your lifestyle, health goals, and personal schedule.
1. Time-Restricted Eating (The 16:8 or 14:10 Method)
This is the most popular and accessible form of fasting. It involves limiting your daily food intake to a specific window of time each day and fasting for the remaining hours.
· How it works: In a typical 16:8 routine, you fast for 16 hours overnight and during the morning, restricting all meals to an 8-hour window (for instance, eating only between 11:00 AM and 7:00 PM).
· Pros:
Highly sustainable, easy to integrate into social schedules, does not require calorie counting or special meal plans.
· Cons:
Less dramatic autophagy response compared to longer fasts; easy to overeat or consume poor-quality foods during the feeding window if unmindful.
2. The 5:2 Protocol (The Weekly Fast)
Popularised by medical journalists and researchers, the 5:2 diet approaches fasting on a weekly rather than daily cycle.
· How it works: You eat normally for five days of the week. On the remaining two non-consecutive days (e.g., Tuesdays and Thursdays), you limit calorie intake to approximately 500 to 600 calories per day.
· Pros:
Offers flexibility since you only modify your habits two days a week; yields significant improvements in insulin sensitivity.
· Cons:
The two low-calorie days can cause persistent hunger, irritability, and low energy, especially during the first few weeks of adaptation.
3. Alternate-Day Fasting (ADF)
A more intensive protocol often studied in clinical trials for rapid metabolic improvement and weight loss.
· How it works: You alternate between days of unrestricted eating and days where you either consume zero calories or a single micro-meal of about 500 calories.
· Pros:
Highly effective for weight reduction and blood sugar regulation; triggers robust physiological adaptations.
· Cons:
Difficult to sustain long-term for most individuals; high risk of evening hunger pangs and social disruption on fasting days.
4. Prolonged Periodic Fasting (24 to 48 Hours)
This involves taking extended breaks from food once or twice a month, or once a season.
· How it works: Abstaining from all caloric intake (water, herbal teas, and black coffee are allowed) for a full 24 to 48 hours.
· Pros:
Maximises deep cellular repair (autophagy), immune system reset, and ketone production.
· Cons:
Requires strict medical awareness and psychological readiness; carries higher risks of light-headedness, electrolyte imbalances, and muscle loss if done too frequently or without adequate nutrition afterwards.
What Medical Research Shows: The Health Benefits
Clinical research published in many reputed medical journals highlights several major biological benefits associated with periodic fasting:
· Weight Loss and Visceral Fat Reduction: By narrowing the eating window, most people naturally consume fewer calories. Furthermore, lower insulin levels combined with elevated noradrenaline levels make it easier for the body to access stubborn visceral fat (E.g. the metabolic fat stored around abdominal organs).
· Improved Insulin Sensitivity and Type 2 Diabetes Management:
Fasting gives the pancreas a rest and reduces chronic insulin exposure. Studies show marked drops in fasting blood glucose and resting insulin levels, significantly reducing the risk of developing insulin resistance.
· Cardiovascular Support:
Regular fasting patterns have been associated with improvements in key heart health markers, including reduced systemic inflammation (reduced C-reactive protein), lower blood pressure, decreased resting heart rate, and improved blood triglyceride levels.
· Brain Health and Mental Clarity:
Fasting stimulates the production of a protein called Brain-Derived Neurotrophic Factor (BDNF). It promotes the growth of new neurons and protects against neurodegenerative decline. Many practitioners report heightened focus and mental sharpness once their body adapts to burning ketones.
· Cellular Renewal and Reduced Inflammation:
By clearing out damaged cellular components through autophagy, fasting helps suppress chronic low-grade inflammation; a fundamental driver of premature ageing, heart disease, and autoimmune conditions.
Undesirable Effects and Possible Pitfalls
While periodic fasting offers substantial benefits, it is not without potential downsides, particularly during the initial adaptation period or when practised incorrectly.
· The “Adaptation Phase” Symptoms: During the first 1 to 2 weeks, as the body transitions away from constant sugar reliance, individuals frequently experience headaches, fatigue, brain fog, irritability, and mild dizziness.
· Digestive Disturbances:
Changes in meal timing and volume can lead to constipation, heartburn, or loose stools as gut motility adapts.
· Nutritional Deficiencies and Muscle Loss:
If you do not eat nutrient-dense meals during your eating windows, fasting can lead to deficiencies in essential vitamins, minerals, and protein. Insufficient protein intake combined with fasting can cause the body to break down lean muscle mass alongside fat.
· Disrupted Relationship with Food:
For individuals prone to disordered eating, strict fasting windows can trigger unhealthy cycles of restriction followed by severe binge eating during open windows.
· Sleep Problems:
Fasting raises cortisol and adrenaline levels slightly to maintain blood glucose. For some, late-evening hunger or elevated alertness can interfere with sleep.
Age Groups: Who Should Fast, and Who Should Avoid It?
Fasting affects the human body differently depending on life stage, hormonal status, and metabolic demands.
Recommended Age Groups (Healthy Adults Ages 18 to 65)
· Young & Middle-Aged Adults (18–50):
They generally tolerate all forms of fasting exceptionally well. This age bracket stands to gain significant preventative metabolic benefits against lifestyle diseases.
· Older Adults (51–65): Benefit greatly from improved insulin sensitivity and cardiovascular support. However, they need to pay careful attention to maintaining adequate muscle mass by consuming sufficient protein and performing resistance exercises.
Groups Who Must Exercise Caution or Seek Supervision
· Seniors Over 65–70:
Older individuals face higher risks of unintended weight loss, sarcopenia (muscle wasting), and frailty. Any fasting regimen for seniors should be mild (e.g., 12 to 14 hours) and supervised by a physician.
· Individuals with Chronic Conditions: Anyone taking medications for high blood pressure, thyroid function, or diabetes (especially insulin or sulfonylureas) must consult their doctor before fasting, as dosage adjustments are often necessary to prevent severe low blood sugar (hypoglycaemia).
Groups Who Should Avoid Fasting Completely
· Children and Adolescents (Under 18):
Developing bodies require continuous, reliable nutrients and energy for growth, organ development, and hormonal balance.
· Pregnant or Breastfeeding Women: Nutrient and energy demands are significantly elevated to support foetal development and milk production. Restricting food can harm both mother and child.
· Individuals with a History of Eating Disorders:
Fasting rules can exacerbate behaviours related to anorexia, bulimia, or compulsive bingeing.
· Underweight Individuals:
Those with a Body Mass Index (BMI) below 18.5 should not fast, as fat stores are insufficient to support metabolic switching safely.
Practical Tips for Starting Safely
If you decide to incorporate periodic fasting into your life, keep these medical best practices in mind:
· Start Slowly: Don’t jump straight into a 24-hour fast. Begin with a simple 12-hour overnight fast (e.g., 7:00 PM to 7:00 AM) and gradually extend it to 14 or 16 hours over several weeks.
· Prioritise Hydration:
Fasting means abstaining from calories, not fluids. Drink plenty of water throughout the day. Black coffee, plain green or black tea, and herbal infusions without sugar or milk, do not break a fast and help suppress mild hunger.
· Electrolytes Matter:
As insulin drops, the kidneys excrete sodium and water more rapidly. If you experience headaches or light-headedness, adding a tiny pinch of salt to your water can help restore balance.
· Focus on Food Quality:
Fasting is not a free pass to eat junk food during your feeding window. Centre your meals around whole foods: lean proteins, healthy fats (olive oil, avocados, nuts), complex carbohydrates, and plenty of vegetables.
· Listen to Your Body:
Mild hunger pangs that come in waves are normal; severe weakness, persistent dizziness, nausea, or confusion are not. If you feel genuinely unwell, break your fast calmly with a light meal.
The Key Takeaway
(the witticism and pun is intended!)
Periodic fasting is not a quick-fix diet or a magical remedy. Rather, it is a flexible, cost-free tool that aligns our eating patterns with human evolutionary biology. By giving your body regular, structured breaks from digestion, you allow internal repair systems to kick in, sharpen metabolic efficiency, and support long-term vitality.
Whether you choose a gentle 14-hour daily rest or a structured 5:2 weekly routine, the key to success in periodic fasting lies in consistency, the provision of adequate nutrition despite fasting, good hydration and listening closely to your body’s signals. Fasting should be designed and undertaken to empower your life and health: not overtake it and take complete control of it. It is another voluntary mechanism that humans can undertake to stay healthy, but it definitely is NOT a panacea for all ills.
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