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The Body Clock
THE
BODY CLOCK
Free tool

The Best Time to Drink Water

Right after you wake up β€” then steadily through the day. You spend all night losing water through your breath and skin, so you wake up mildly dehydrated. A glass first thing is one of the easiest wins there is. Here is your window.

Your time

7:05 AM

Drink a glass of water as soon as you are up. You lose fluid overnight, and rehydrating now sharpens alertness before your first coffee.

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The science

Overnight you lose fluid steadily and wake up a little dehydrated β€” which on its own can leave you groggy and slow to get going. A glass of water soon after waking rehydrates you and helps you feel alert before your first coffee.

Front-load your fluids across the morning and afternoon, then ease off in the last couple of hours before bed so a full bladder does not wake you in the night. Your morning anchor is tied to your wake time, which the tool pins for you.

Frequently asked questions

Should I drink water before or after coffee?

Before. A glass of water on waking rehydrates you after the night and primes you, then waiting about 90 minutes for coffee lets your natural cortisol do its job first. Water first, coffee a bit later.

How much water should I drink in the morning?

A glass or two (roughly 250–500ml) on waking is a sensible start β€” enough to counter overnight fluid loss. Total daily needs vary by body size, activity, and climate, so use thirst and pale-yellow urine as your guide.

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