Guide · body · 3 min read
Do you actually need eight glasses of water — a plain-language guide, when you want something simple
Eight glasses is a number with no particular evidence behind it. Thirst and urine colour are better guides.
Start here
Every point here is written so that a bad week is still enough to manage it.
Simple is the point. There is no advanced version to graduate to.
If you only do one thing from this page, do the first point below. It is first because it removes the most friction for the least effort.
What helps
Drinking more than you need does not improve skin, concentration or health. It mostly increases trips to the toilet.
Food supplies a meaningful share of your water, especially fruit and vegetables.
Tea and coffee count. The idea that they dehydrate you is largely wrong at normal intakes.
What to do when it does not work
There are real exceptions: hot weather, exercise, illness, pregnancy, and some medications. In those cases thirst lags behind need.
Your kidneys are extremely good at telling you what they need. Thirst is a reliable signal for healthy adults.
Pale straw-coloured urine is the simplest check. Dark yellow means drink more; completely clear means you can stop.
Questions people ask
Does coffee dehydrate you?
At normal intakes, no. The diuretic effect is small and does not outweigh the fluid you are taking in.
Can you drink too much water?
Yes, though it is rare. Extremely large amounts in a short time can dilute blood sodium, which is dangerous.
Written for people who want the practical version. No accounts, no tracking, no newsletter wall.