Nutrition Timing and Circadian Rhythms
Linas JuozėnasShare
Nutrition timing & circadian rhythms
Eat well. Fuel what you do. Make room for restful sleep.
A useful eating rhythm makes daily life easier: there is food available when you need it, training has adequate fuel, and dinner leaves you comfortable when it is time to rest.
Research into meal timing helps explain why the same food can produce different responses at different times. Turning that research into everyday advice requires care. A laboratory finding about glucose or hunger is one piece of evidence; it does not establish a perfect timetable for every person.
This guide brings the evidence together with practical options for ordinary working days, evening exercise and night shifts. The aim is a pattern you can live with, enjoy and adapt.
A schedule should leave room for the meals and nutrients your life requires.
Managing reflux, preparing for a long ride and organising lunch are different tasks.
Work, family, health and training can change. Your eating pattern can change with them.
Give meal timing a clear job
WHO describes a healthy diet through adequacy, balance, moderation and diversity. Its composition depends on a person's needs, culture and available foods.[1] Moving a meal on the clock cannot supply nutrients that are missing from it.
Across the day, make room for varied foods: vegetables and fruit, grains and other starchy foods, pulses, appropriate protein sources and fats. Familiar options such as oats, buckwheat, rye bread, potatoes, beans, fish, eggs, dairy foods or suitable alternatives can fit many different schedules.
Decide what you want to improve
Perhaps lunch keeps disappearing into meetings. Perhaps a large late dinner leaves you uncomfortable, or you arrive at training hungry. Begin with that specific difficulty. “Pack lunch on office days” is a clearer experiment than “optimise my metabolism.”
Weight change is only one possible outcome. Having enough energy for a session, enjoying a shared meal or reducing the effort of deciding what to eat can be worthwhile goals in their own right.
Include the conditions around the meal
Time, money, food access, storage, cooking facilities and caring responsibilities shape what is possible. A schedule requiring a freshly prepared meal during an uninterrupted break will fail if neither the kitchen nor the break exists.
Before changing the clock, ask what would make the next meal available. The answer may be a packed meal, a shopping routine, a workplace arrangement or help from someone at home.
The body has a network of daily rhythms
Circadian rhythms are approximately 24-hour patterns in biological activity. A coordinating clock in the brain, the suprachiasmatic nucleus, receives information about light through the eyes. Clocks also operate in many other tissues. Together, these rhythms help organise sleep, temperature, hormones and digestion. Light and darkness are especially influential; food and activity provide additional timing signals.[2]
Meals do not reset every part of this system in the same way. In a laboratory study of ten healthy young men, delaying meals by five hours shifted glucose rhythms and a clock-gene rhythm in fat tissue, without shifting the measured melatonin and cortisol rhythms.[3] This illustrates why “food resets your body clock” is too simple.
Clock time and biological time are different
The biological night refers to the body's internal night phase. A number on the kitchen clock cannot identify it precisely for everyone, particularly when sleep schedules differ or work rotates.
Likewise, “eat only while the sun is up” is an impractical universal rule. In Lithuania and other northern locations, winter daylight and summer daylight differ greatly. Use your actual sleep, work and eating opportunities when making a plan.
For everyday decisions, you do not need a laboratory measurement of circadian phase. Begin with the circumstances you can observe: when you sleep, when food is available, when you train and how the arrangement feels.
Ask what changed besides the clock
Meal-timing studies answer different questions. Some provide all food and match energy intake. Others ask people to change their eating hours while choosing their own meals. If the second approach leads someone to eat less, the outcome reflects the whole change, including the amount eaten.
A short study can show a physiological effect under controlled conditions. A longer trial helps test whether a strategy remains useful in daily life. Neither design answers every question about health, enjoyment or feasibility.
| Study and comparison | What researchers found | What it does not establish |
|---|---|---|
| Matched food intake, different eating windows | A 12-week trial in 41 adults with obesity and prediabetes or diet-controlled diabetes found no meaningful advantage in weight loss or glucose measures for an early 10-hour window over the comparison schedule.[4] | That timing never matters, or that every eating-window strategy has identical effects. |
| Larger breakfast versus larger dinner | In 30 adults with overweight or obesity, two four-week diets produced similar weight loss and energy expenditure. Participants reported less hunger during the morning-loaded diet.[5] | That a larger breakfast increases daily calorie burning or suits every appetite. |
| Very early eating with weight maintained | A small five-week crossover study in men with prediabetes found improvements in insulin sensitivity and blood pressure with a six-hour eating period ending before 15:00.[6] | That everybody should stop eating at 15:00, or that this prevents future disease. |
Keep the measured outcome attached to the claim
Lower hunger is not the same as greater weight loss. A change in insulin sensitivity is not proof that diabetes has been prevented. An increase in overnight muscle protein synthesis is not a measurement of months of muscle growth.
Useful reporting names the participants, comparison, duration and outcome. It also leaves room for uncertainty instead of turning a promising mechanism into a guarantee.
Earlier meals may help without requiring an early finish
The morning-loaded trial offers one practical possibility: shifting some food earlier may help with hunger, even when daily energy expenditure does not change.[5] The early-eating proof-of-concept study suggests that some metabolic responses can improve independently of weight loss in a selected population.[6]
A 2026 network meta-analysis combined 41 randomised trials and found more favourable body-weight and fasting-insulin outcomes with earlier eating windows than with later ones. Results for window length were inconsistent.[7] This broader evidence strengthens the case for considering when an eating window falls, while leaving its ideal length uncertain.
These findings do not identify one ideal breakfast size or dinner hour for the public.
Try redistribution when it answers a real problem
If breakfast is only coffee, lunch is frequently missed and dinner has become the first substantial meal, consider protecting an earlier eating opportunity. For example, prepare breakfast the night before or bring a lunch that can be eaten during the break you actually have.
Keep the rest of the day in view. Someone attending an evening class may still need a meal afterwards. A household may value dinner together. Moving some food earlier can be compatible with both.
Judge the trade-off
Does the change make the day easier? Are you comfortable during work and activity? Can you still eat enough and enjoy dinner? If an early schedule creates a hurried morning and a hungry evening, change the arrangement.
A useful adjustment can be modest. It does not have to reproduce a research protocol to address an everyday difficulty.
Breakfast, snacks and meal frequency depend on the day
Breakfast can be an enjoyable, convenient way to eat before work or activity. Adding breakfast solely to produce weight loss is a different claim. A review of 13 randomised trials did not establish that strategy as helpful; the trials were short and had important limitations.[8] This is not a reason to remove a breakfast that works for you.
Use meals as dependable opportunities
A routine might include three meals, or meals with snacks where useful. The names matter less than whether the pattern fits your needs. There is no obligation to turn an ordinary day into a sequence of timed mini-meals.
On busy days, a planned snack can bridge a gap that would otherwise be awkward. On another day, the next meal may be close enough that no snack is wanted. Allow both possibilities.
Regular does not mean identical
Think in terms of reliable opportunities: something available after waking, a protected lunch break, food before a long activity and dinner when the household can gather. A weekend or delayed journey need not follow weekday minutes exactly.
If morning appetite is low, consider what is manageable rather than forcing a large meal. A smaller first meal with another opportunity later may suit your day. If a clinician has prescribed a particular eating schedule, use that plan as the starting point.
A routine should help you notice and meet needs. It should also leave room for hospitality, celebration and changes of plan without a sense of having failed.
Time-restricted eating is an option to assess carefully
Time-restricted eating limits eating to a recurring part of the day. It is one form of intermittent fasting; approaches involving alternate days or selected fasting days are different protocols.
A 2026 Cochrane review of 22 trials in adults with overweight or obesity found that intermittent fasting may produce little or no additional weight loss or quality-of-life benefit compared with conventional dietary advice. Confidence in much of the evidence was low or very low, and follow-up extended no further than 12 months.[9]
The 12-week trial that supplied matched food likewise found no extra weight-loss benefit from its early eating window.[4] This helps separate the effect of the schedule from changes in total food intake.
Reviews use different study criteria and comparisons. Benefits over an unchanged usual diet do not automatically imply benefits over another structured eating plan. The early-versus-late analysis in section 4 addresses a further question about where an eating window falls.
Evaluate the whole experience
For someone who prefers a defined schedule, an eating window may feel straightforward. For someone else, it may collide with breakfast, medication, an evening session or a shared meal. Consider those details before treating the schedule as an improvement.
A ten-hour window is a description, not a target everyone needs to reach. Progressively shortening it is not a necessary next step. Ask whether the pattern solves your original problem and leaves enough room for nourishment.
Keep claims proportional
The evidence discussed here does not establish that a particular fasting duration extends human life or guarantees disease prevention. A familiar overnight gap between dinner and breakfast does not need to become a competition.
Some circumstances call for a different plan
Self-directed fasting regimens are unsuitable during childhood and adolescence, pregnancy or breastfeeding, and for people with an eating-disorder history. Johns Hopkins also advises against them for people with type 1 diabetes taking insulin.[10] A general wellness article should not displace the support needed in these situations.
Medication and glucose management
Skipping or delaying meals can increase the risk of low blood glucose in people taking insulin or certain other diabetes medicines, including sulfonylureas.[11] If this applies to you, discuss any substantial timing change with your diabetes team first. Follow your established plan for low glucose; do not independently change medication to accommodate a fasting window.
Training and adequate energy
Problematic low energy availability means that food intake leaves insufficient energy for normal body functions after exercise demands are accounted for. The IOC consensus describes potential health and performance consequences in athletes of all sexes.[12] An eating schedule that makes adequate intake difficult deserves reconsideration.
Unexplained weight loss, persistent fatigue, recurrent injuries or menstrual changes warrant assessment rather than simply tightening food rules. These concerns have several possible causes; a clinician and appropriately qualified dietitian can help investigate them.
Let care needs guide the routine
If you are underweight, frail, recovering from illness or already struggle to eat enough, seek an individual nutrition plan before restricting eating opportunities. The useful question may be how to make food easier to obtain and tolerate.
If timing rules make eating increasingly anxious or compulsory, step back from the rules and seek appropriate support. A schedule should serve your life and care needs.
Consider dinner in relation to your bedtime
For people with reflux symptoms at night or while lying down, NIDDK advises that finishing meals at least three hours before lying down may improve symptoms.[13] This is guidance for a particular problem, not a universal deadline for all eating.
When dinner repeatedly feels too close to bed
Consider whether part of the meal could move earlier. If the obstacle is travel, have a suitable meal available before the journey. If work runs late, protect lunch and consider an earlier snack rather than leaving every food decision until you get home.
People differ in which foods trigger reflux. Pay attention to your own symptoms instead of removing a long list of foods automatically. Persistent or troublesome symptoms deserve clinical advice.[13]
Keep evening nourishment available
An evening snack or a meal after training can have a clear purpose. The decision includes what you have eaten, what activity you have done, your appetite and your comfort. A fixed rule such as “nothing after 18:00” cannot account for all of these.
Prepare an option before leaving for an evening session so the return home involves fewer decisions. A simple sandwich, a bowl of porridge or a prepared portion of dinner may be more manageable than cooking from the beginning.
If you are hungry, do not treat enduring hunger as proof that the schedule is working. Revisit how the day's meals fit together, especially if the same difficulty keeps returning.
Include caffeine when reviewing sleep
Caffeine deserves attention before fine adjustments to meal times. EFSA notes that a single dose of 100 mg may affect sleep in some adults, particularly near bedtime.[14] Effects depend on the person and the amount; a population safety limit is not a guarantee of undisturbed sleep.
Include coffee, tea, energy drinks and caffeinated pre-workout products when considering your intake. Check labelled amounts where available. If sleep is difficult, try moving caffeine earlier or reducing it, then notice whether the change helps.
A practical evening review
Ask three separate questions: am I comfortably fed, am I taking caffeine late in my waking period, and have I allowed enough time to settle for sleep? Changing all three at once may make it harder to understand what helped.
A pleasant evening food ritual can be worth keeping because you enjoy it. You do not need to explain it through a promised serotonin boost or a special combination of “sleep foods.” Choose familiar foods that suit your appetite and digestion.
Keep the wider sleep pattern in view
If sleep remains persistently difficult, the answer may extend beyond food. Bring a clear description of the problem to a healthcare professional, including your working hours and any symptoms that interrupt rest. The Sleep and Recovery article explores sleep in greater depth.
The purpose of reviewing meals is to remove an avoidable difficulty, not to make yourself responsible for solving every sleep problem through diet.
Plan pre-exercise food around the actual demand
Sports-nutrition guidance supports carbohydrate-containing food in the hours before prolonged exercise, with timing, amount and food choice adapted to the individual and event. A meal one to four hours beforehand is a common planning range for demanding sessions; it is not a requirement before every walk.[15]
Choose something familiar
With several hours available, a normal meal may fit. With less time, a smaller familiar snack may be more comfortable. Examples to try include porridge, bread with a suitable topping, or fruit with another food you tolerate.
Large amounts of fat or fibre close to a demanding event can be uncomfortable for some athletes. Test food choices during training rather than introducing them on an important race day.[15]
Make the food available before you need it
If you travel directly from work to training, pack the food alongside your equipment. Check whether it needs refrigeration and whether you will actually have a place and time to eat it.
For an early session, decide the previous evening what is realistic. A short, easy outing and a long, demanding ride create different planning problems. A sports dietitian can help when the schedule, appetite and training load are difficult to reconcile.
A useful pre-session plan answers ordinary questions: what is available, when can I eat it, and have I tried it before?
Timing becomes more relevant when demands increase
During prolonged, demanding exercise, carbohydrate intake can help maintain fuel supply. Sports-nutrition guidance commonly uses around 30–60 g per hour for suitable endurance sessions lasting beyond about an hour; longer events can require a more specialised plan.[16] Duration, intensity, tolerance and prior food intake matter. This is not a routine requirement for a brief recreational session.
After exercise, consider what comes next
Rapid carbohydrate replacement is especially relevant when another demanding session follows within a few hours. With a longer recovery period, meals across the day provide more opportunities to replenish fuel.[16]
Plan a practical meal or snack after training, particularly when the next meal is otherwise distant. Protein and carbohydrate can come from ordinary food. You might prepare rice with tofu and vegetables, a bean-filled wrap, or bread with eggs and fruit. These are examples to adapt, not equal nutrient prescriptions.
Let the schedule support recovery
Do not deliberately postpone needed food just to preserve an eating window. If training ends late, plan the evening meal around it and use the comfort considerations discussed earlier.
There is no universal 30-minute deadline after which the opportunity for recovery disappears. Recent meals and total daily protein intake influence how urgent the next protein serving is.[17] Having food organised is more useful than worrying about a countdown.
For tournaments, multiple daily sessions or long endurance events, obtain a plan that includes food access, fluid needs and opportunities to practise eating during activity.
Distribute protein without turning meals into alarms
For healthy exercising adults, adequate daily protein is a central priority. Spreading useful servings across meals is a practical strategy. The ISSN position stand gives approximately 20–40 g per serving as a general athlete range, with needs varying by body size, age and exercise.[17] This is guidance for a particular context, not a compulsory amount for every reader.
Consider where protein already appears in your day. Eggs, fish, dairy foods, tofu, beans and lentils offer different ways to build meals. If one meal has little protein, consider an addition you enjoy rather than designing a new timetable around supplements.
Food can be digested during sleep
In a small experiment involving 16 healthy young men after evening resistance exercise, protein consumed before bed was digested and absorbed overnight and improved whole-body protein balance.[18] Digestion does not simply switch off at bedtime.
That experiment compared extra protein with a non-protein placebo. It does not prove that the same protein is more effective at bedtime than earlier, or that everyone needs a bedtime shake.
Use a snack when it serves a purpose
If an evening snack helps you complete the day's food intake and feels comfortable, it can fit the plan. If you have already eaten adequately and do not want it, a research protocol is not a reason to force another meal.
Choose foods according to preference, tolerance and any individual dietary advice. Keep convenience in view: the best available option may be something already in the kitchen.
Night shifts need workable food and protected rest
In a 14-day laboratory study involving 19 healthy young adults, daytime eating prevented the rise in glucose observed with nighttime eating during simulated night work.[19] This is promising evidence about short-term physiology. It does not establish that real shift workers should always go without food throughout a night shift.
Start with the actual roster
Map the shift, journey, available breaks and main sleep period. Identify when a substantial meal is practical, then arrange food for the remaining working hours. A meal before the shift and manageable food during breaks may be a useful starting arrangement.
Avoid making yourself hungry, unwell or unable to work safely in order to imitate a laboratory schedule. Seek individual advice when diabetes, medication or heavy training complicates the pattern.
Make the environment part of the plan
Reliable breaks, drinking water, food storage and access to suitable meals require workplace cooperation. Discuss these needs rather than assuming the worker can solve them through willpower.
If the roster changes often, keep a few portable options available and review the plan when the shift pattern changes. A schedule designed for day work may need substantial revision.
For travel, plan the next eating opportunity
Check journey length, local meal availability and any storage needs. Carry a suitable option when delays are likely. On arrival, use the local routine as a practical organising point while attending to sleep and appetite.
A changed meal schedule alone is not a demonstrated instant cure for jet lag. Aim first to make the journey and the next day manageable.
Choose one change you can evaluate
The examples below illustrate planning choices. They are not clinical diets, and they do not prescribe how much anyone should eat. Start with your existing routine and change the part that is creating difficulty.
| Situation | A possible arrangement | What to review |
|---|---|---|
| Lunch disappears into a busy working day | Prepare an accessible meal, agree on a break and keep a suitable backup option. | Was food actually available? Did the break happen? What prevented it? |
| Training finishes in the evening | Eat during the day, arrange a familiar pre-session option and prepare food for afterwards. | Comfort during exercise, enough food afterwards and how the evening fits bedtime. |
| A night shift interrupts the usual routine | Plan around the roster, breaks and main sleep period; arrange food before leaving home. | Food access, adequate intake, comfort, work demands and any clinical instructions. |
| A shared dinner happens later than usual | Keep earlier meals and have an appropriate snack if needed; enjoy the gathering. | Whether the occasional change actually creates a problem that needs solving. |
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Name one difficulty.
Choose a concrete issue such as a missed lunch, an uncomfortable dinner or arriving hungry at training.
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Check what must fit.
Include sleep, work, medication instructions, activity, food access and meals you value sharing.
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Make one manageable adjustment.
Prepare a meal, move part of your food earlier, change caffeine timing or organise a post-session option.
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Notice the experience.
After several comparable days, consider comfort, appetite, energy, sleep and practicality. A brief optional note is enough; detailed tracking is unnecessary.
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Keep, revise or stop.
Retain what helps. Change arrangements that create difficulty. Seek individual advice when symptoms persist or nutritional needs are hard to meet.
This sequence is a practical way to organise a decision. Your observations can help you judge whether the arrangement is useful; they cannot diagnose a glucose disorder or prove that a biological mechanism changed.
Keep a fallback version for disrupted days. An available packed meal or a simple cupboard option may be more valuable than a detailed schedule that works only when everything runs on time.
Keep the everyday decisions simple
What is the best time to stop eating?
There is no single hour for everyone. Consider your bedtime, food needs, activity and symptoms. For nighttime reflux, the specific guidance in section 8 is a useful starting point.
Do I have to eat breakfast?
Breakfast can fit your appetite and routine, but adding it is not an established weight-loss strategy.[8] Consider what the first part of your day requires and any individual care plan.
Is a shorter eating window always better?
No universal best window has been established. Consider whether the pattern leaves enough room for food, activity and daily responsibilities. There is no need to keep narrowing it.
Does eating earlier burn more calories?
Not necessarily. The controlled morning-versus-evening meal study found a difference in reported hunger, without a difference in daily energy expenditure.[5] One response should not be substituted for the other.
Do I need protein within 30 minutes of exercise?
There is no universal 30-minute cut-off. Organise a suitable meal or snack, taking account of what you ate before the session and your overall intake. See section 11.
Can I eat after an evening workout?
Yes. Make needed food part of the evening plan and choose an amount and type that feel comfortable. If reflux repeatedly complicates eating and sleep, seek advice about the whole arrangement.
Should night-shift workers avoid all food at night?
The small simulated-night-work study does not establish that as a universal rule.[19] Work demands, adequate intake, safe performance and individual medical needs remain part of the decision.
Could my pre-workout drink affect sleep?
If it contains caffeine, it could. Check the amount and timing, including caffeine from other drinks. Sensitivity varies; consider an earlier or caffeine-free option when sleep is affected.[14]
Do I need a bedtime protein shake?
No. A small overnight experiment does not establish a universal requirement.[18] Consider whether an additional snack serves your actual food needs and whether it is comfortable.
What if a late social meal changes my routine?
Allow room for it. Consider whether it causes a practical problem before trying to correct anything. Return to the pattern that normally works for you, without compensatory food rules.
Sources behind the guide
The references distinguish controlled feeding studies, short laboratory experiments, evidence reviews, sports-nutrition statements and public-health guidance. Each answers a particular question; none supplies a universal eating timetable.
Sources were checked on 5 September 2026. The 2026 Cochrane review searched for studies through November 2024; publication date and evidence-search date are different. Meal examples and planning sequences here are practical illustrations, not tested treatment programmes.
- World Health Organization. Healthy diet. Fact sheet, 26 January 2026.Public-health guidance on overall dietary quality and adequacy; it does not prescribe a universal meal schedule. Return to text ↑
- National Institute of General Medical Sciences. Circadian Rhythms. Educational fact sheet; content reviewed September 2023.Background on biological clocks and environmental signals. This is an explanation of physiology, not a meal-timing trial. Return to text ↑
- Wehrens SMT, Christou S, Isherwood C, et al. Meal Timing Regulates the Human Circadian System. Current Biology, 2017;27:1768–1775.e3.Thirteen-day laboratory protocol in ten healthy young men. Changes in selected rhythms do not establish long-term clinical benefit. Return to text ↑
- Maruthur NM, Pilla SJ, White K, et al. Effect of Isocaloric, Time-Restricted Eating on Body Weight in Adults With Obesity: A Randomized Controlled Trial. Annals of Internal Medicine, 2024;177:549–558.Small, single-site, 12-week trial with matched energy and nutrients. Both groups lost weight; the early window did not add a significant benefit. Most participants were Black women. Return to text ↑
- Ruddick-Collins LC, Morgan PJ, Fyfe CL, et al. Timing of daily calorie loading affects appetite and hunger responses without changes in energy metabolism in healthy subjects with obesity. Cell Metabolism, 2022;34:1472–1485.e6.Crossover trial of two energy-restricted, matched-energy diets. Lower reported hunger did not produce greater weight loss under the study conditions. Return to text ↑
- Sutton EF, Beyl R, Early KS, et al. Early Time-Restricted Feeding Improves Insulin Sensitivity, Blood Pressure, and Oxidative Stress Even without Weight Loss in Men with Prediabetes. Cell Metabolism, 2018;27:1212–1221.e3.Small controlled feeding study with weight maintained. Selected physiological outcomes improved; the trial did not test long-term disease prevention. Return to text ↑
- Chen YE, Tsai HL, Tu YK, Chen LW. Effects of timing and eating duration of time restricted eating on metabolic outcomes: systematic review and network meta-analysis. BMJ Medicine, 2026;5:e001071.Network synthesis of 41 trials involving 2,287 participants, using direct and indirect comparisons. Findings concern measured metabolic outcomes; eating-window duration rankings were inconsistent. Return to text ↑
- Sievert K, Hussain SM, Page MJ, et al. Effect of breakfast on weight and energy intake: systematic review and meta-analysis of randomised controlled trials. BMJ, 2019;364:l42.Thirteen adult trials from high-income countries, with short follow-up and high or unclear risk of bias. This does not determine whether breakfast suits an individual's day. Return to text ↑
- Garegnani LI, Oltra G, Ivaldi D, et al. Intermittent fasting for adults with overweight or obesity. Cochrane Database of Systematic Reviews, 2026;2:CD015610.Evidence searched through 5 November 2024. Protocols varied; many findings had low or very low certainty, and adverse effects remained uncertain. Return to text ↑
- Johns Hopkins Medicine. Intermittent Fasting: What Is It, And How Does It Work?. Expert Q&A, updated 7 April 2026.Used here for the section identifying people who should avoid self-directed fasting, rather than for its broader claims about metabolic or disease benefits. Return to text ↑
- National Institute of Diabetes and Digestive and Kidney Diseases. Low Blood Glucose (Hypoglycemia). Patient guidance.Explains how meal delays, fasting, activity and some diabetes medicines can contribute to low glucose. Medication decisions require an individual care plan. Return to text ↑
- Mountjoy M, Ackerman KE, Bailey DM, et al. 2023 International Olympic Committee’s (IOC) consensus statement on Relative Energy Deficiency in Sport (REDs). British Journal of Sports Medicine, 2023;57:1073–1097.Expert consensus on problematic low energy availability and its health and performance consequences. Symptoms require assessment; they do not establish a diagnosis on their own. Return to text ↑
- National Institute of Diabetes and Digestive and Kidney Diseases. Eating, Diet, & Nutrition for GER & GERD. Patient guidance, reviewed July 2020.The three-hour advice concerns reflux at night or when lying down. It is not a universal prohibition on evening food. Return to text ↑
- European Food Safety Authority. Caffeine. Topic summary of the 2015 Scientific Opinion on caffeine safety.Sleep effects can occur in some adults at doses below general daily safety limits; amount, timing and individual sensitivity matter. Return to text ↑
- Thomas DT, Erdman KA, Burke LM. Nutrition and Athletic Performance. Medicine & Science in Sports & Exercise, 2016;48:543–568.Joint position statement of the Academy of Nutrition and Dietetics, Dietitians of Canada and ACSM. Sport-specific guidance should be adapted to the event and athlete. Return to text ↑
- Kerksick CM, Arent S, Schoenfeld BJ, et al. International society of sports nutrition position stand: nutrient timing. Journal of the International Society of Sports Nutrition, 2017;14:33.Position statement for healthy exercising adults, especially highly trained people. Demanding endurance work and short recovery intervals create particular fuelling needs. Return to text ↑
- Jäger R, Kerksick CM, Campbell BI, et al. International Society of Sports Nutrition Position Stand: protein and exercise. Journal of the International Society of Sports Nutrition, 2017;14:20.Guidance for healthy exercising individuals. Serving ranges and timing suggestions are context-dependent, not universal prescriptions. Return to text ↑
- Res PT, Groen B, Pennings B, et al. Protein ingestion before sleep improves postexercise overnight recovery. Medicine & Science in Sports & Exercise, 2012;44:1560–1569.Acute experiment in 16 young men using 40 g casein versus placebo. It did not compare the same extra protein taken at another time or measure long-term muscle growth. Return to text ↑
- National Heart, Lung, and Blood Institute. Study finds daytime meals may reduce health risks linked to night shift work. Research-funder report, 3 December 2021, on Chellappa SL et al., Science Advances, 7:eabg9910.Report of a randomised laboratory experiment in 19 healthy young adults. Simulated night work and short-term glucose outcomes do not establish an ideal roster-wide eating plan. Return to text ↑