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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsThere is no single best first food or universal meal schedule for ending a prolonged fast. If you have eaten little or nothing for more than five days, have lost substantial weight, have a low body weight, or have a relevant illness or medication, get medical advice before restarting food: refeeding may require a cautious, monitored plan rather than ordinary meal-by-meal advice.
First, work out whether this is a medically higher-risk refeed
“Prolonged fast” can describe different situations. The key concern in clinical refeeding guidance is not a particular fasting label; it is the duration of very low or absent intake together with a person’s nutritional status and health. NICE adult nutrition-support guidance says that people who have eaten little or nothing for more than five days should begin nutrition support at no more than 50% of their requirements for the first two days, with increases only if clinical and biochemical monitoring shows no refeeding problems. This is clinical guidance, not a do-it-yourself calorie target or a universal home schedule.
NICE identifies a person as high risk of refeeding problems if any one of these applies:
- Body mass index (BMI) is below 16 kg/m².
- Unintentional weight loss was greater than 15% over the previous 3–6 months.
- There has been little or no nutritional intake for more than 10 days.
- Potassium, phosphate, or magnesium levels were low before feeding.
High risk can also apply when two or more of these lesser criteria are present:
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- BMI below 18.5 kg/m².
- Unintentional weight loss greater than 10% over the previous 3–6 months.
- Little or no nutritional intake for more than five days.
- A history of alcohol misuse or use of medicines including insulin, chemotherapy drugs, antacids, or diuretics.
These are prompts for medical assessment, not a self-diagnosis checklist. NICE says people at high risk should be cared for by appropriately skilled healthcare professionals. Its guidance calls for cautious energy introduction, gradual increases, and close attention to fluid balance and clinical status. If any of these risk factors may apply, contact a qualified clinician before trying to manage refeeding on your own.
What should you eat first?
The cited NICE guidance does not name a best first food, prescribe a particular menu, or provide a universal progression back to normal meals. It treats nutrition support as more than choosing a food: a plan may need to account for energy, protein, fluid, electrolytes, minerals, micronutrients, fibre, the person’s medical condition, and tolerance.
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For that reason, a specific “starter meal,” supplement routine, or calorie amount cannot be recommended for everyone based on fasting duration alone. If your fast lasted more than five days, or you have low body weight, substantial recent weight loss, known electrolyte abnormalities, a relevant illness, or medicines that may affect nutrition or electrolytes, ask a healthcare professional what and how much to eat. People who meet high-risk criteria need professionally managed guidance and monitoring.
How to return to normal meals safely
There is no evidence-based universal timetable in this guidance for moving from a first meal to ordinary eating. For someone who has eaten little or nothing for more than five days, NICE’s limit of no more than 50% of requirements for the first two days applies within nutrition support and is conditional on clinical and biochemical monitoring before increasing intake. It should not be converted into a home prescription without clinical advice.
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If you are medically vulnerable or meet a high-risk criterion, a clinician should determine the pace and composition of refeeding and whether monitoring is needed. For shorter fasts in otherwise healthy adults, the cited guidance does not establish a specific first meal or progression either; it cannot support a guaranteed safe menu or schedule. Seek individualized advice if you are unsure whether your health, intake history, or medicines change your risk.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What NICE guidance does—and does not—establish
NICE’s recommendations are for adult nutrition support and clinical monitoring. They establish risk criteria and cautious approaches for people with prolonged low or absent intake; they do not establish that one food is safest for everyone, a fixed sequence of meals, or a schedule for resuming normal eating at home. The recommendations should not be used as a substitute for individualized medical assessment.
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- DOWNRIGHT DELICIOUS: We’re taking a stand against chalky; Not only is this plant protein powder silky smooth, but our vanilla protein shakes flavor is delicious; Mix with water to make protein drinks or blend in smoothies
- SHAKE IT UP: Our protein shake powder has great texture and mixability; Organic pea protein powder mix and whole food vitamins and minerals deliver nutrients you need while also being low in net carbs and 0g sugar
- DON'T TAKE THE HEAT: Made at low temperatures, this lactose free protein powder is anything but ordinary; Scoop up enzymes like lipase, lactase and papain plus live probiotics including probiotic Bacillus subtilis DE111 for digestion and absorption
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Source: NICE, Nutrition support for adults, recommendations.
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