Guide · body · 3 min read
Do you actually need eight glasses of water, for people who have tried everything, when the house is busy
Eight glasses is a number with no particular evidence behind it. Thirst and urine colour are better guides.
Start here
This is not complicated. It is inconvenient, which is why most people skip it.
It works with other people in the house. You do not need silence.
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
Food supplies a meaningful share of your water, especially fruit and vegetables.
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.
What to do when it does not work
Tea and coffee count. The idea that they dehydrate you is largely wrong at normal intakes.
There are real exceptions: hot weather, exercise, illness, pregnancy, and some medications. In those cases thirst lags behind need.
Drinking more than you need does not improve skin, concentration or health. It mostly increases trips to the toilet.
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.
Written for people who want the practical version. No accounts, no tracking, no newsletter wall.