Fasting hydration guide
Fast all day. Stay hydrated all month.
When there is no drinking between dawn and dusk, the hours you can drink have to work harder. Here is how to load fluids and electrolytes at suhoor and rebuild them properly at iftar.
Shop the range Hydration calculatorWhy fasting days feel harder by mid-afternoon
That mid-afternoon headache, dry mouth and dip in focus is usually fluid and mineral debt, not hunger. Long fasting days in hot weather mean you lose water and electrolytes for many hours with no way to top up — so the pre-dawn and evening windows carry the entire day.
Suhoor: load smart, not just large
Drinking a litre of plain water at suhoor mostly sends you to the bathroom before Fajr. Fluid is retained better when it comes with electrolytes and food.
A practical pattern: one prepared Hydralyte serve (one sachet in 500 ml) alongside a water-rich suhoor — dates, yoghurt, fruit, eggs — then plain water to thirst. Go easy on very salty foods and strong coffee, which pull fluid back out.
Iftar to bedtime: rebuild in stages
Break the fast gently — dates and water first, as tradition already gets right. Then rebuild across the evening rather than in one sitting: a Hydralyte serve with or after the main meal, plain water between taraweeh and bedtime.
Spreading intake beats forcing two litres at midnight, and helps you wake up less depleted for the next suhoor.
Who should take extra care
Outdoor workers, pregnant or breastfeeding women, older adults and anyone with kidney or heart conditions should plan fasting hydration with their doctor.
This guide is general information, not medical or religious advice — for questions about your fast, consult your scholar; for questions about your health, your physician.
Frequently asked questions
Does an electrolyte drink count differently from water during eating hours?
It is simply water plus minerals and a small amount of glucose — drink it in the same windows you would drink anything else.
How many serves per fasting day?
One at suhoor and one in the evening suits most adults; the rest of your intake should be plain water.
What about training while fasting?
Train close to iftar, and make your evening serve part of the recovery routine. See our training guide.
Ready for the month ahead.
Shop Hydralyte Try the hydration calculatorThis information is general hydration guidance, not medical or religious advice.