What to drink first thing in the morning?
Short answer: Drink 250–500 ml of plain water (room temperature or slightly warm) within 15–30 minutes of waking to rehydrate after overnight fasting. Avoid starting with sugary beverages; you can have coffee or tea after you’ve had water.
Explanation
Overnight you go several hours without fluids, so the simplest evidence-based first step is rehydration with plain water. Replacing lost water supports blood volume, kidney function, digestion, and cognitive alertness. Drinking water before other beverages can also modestly increase resting energy expenditure and help reduce immediate calorie intake at breakfast. Warm water may ease gastric motility for some people, but there is no strong requirement for temperature. People with specific medical conditions (heart or kidney disease, sodium-restricted diets) should follow clinician guidance about fluid volume and composition.
Tips
- Keep a glass or bottle by the bed and sip 250–500 ml on waking.
- Add a slice of lemon if you prefer flavor—this doesn’t substantially change hydration benefits.
- If you need caffeine, have water first, then coffee or tea 10–30 minutes later.
- Avoid sugary juices or sports drinks first thing; they add calories and spike blood sugar.
- Follow medical advice on fluid limits if you have heart, liver or kidney conditions.
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