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Comprehensive guides about hydration, from basic water intake needs to specific situations like exercise and different climate conditions.
All guides are written and maintained by webuildstuff, based on guidance from the IOM, WHO, EFSA and ACSM.
What water does in circulation, digestion and temperature control, where the evidence is strong, and how the weight-based daily target for adults is worked out.
If taste is the barrier, infused water. Reminders and a measured bottle for tracking, and spreading intake through the day instead of all at once.
Creatine does not add a fixed extra water amount at recommended doses. Hit your normal daily target, spread through the day, and adjust for exercise and heat.
Moderate coffee does not dehydrate regular drinkers, and its fluid counts toward daily intake. Tea and soda compared, and how caffeine tolerance develops.
When to drink before, during and after exercise, electrolytes for prolonged activity, sports drinks versus water, and intake matched to sweat rate.
How much water is too much? Over 3–4 litres in a few hours can outpace healthy kidneys (about 0.8–1 L/hour) and dilute blood sodium. Warning signs, in order.
Heat raises sweat losses and cold weather mutes thirst. How intake changes with temperature, humidity, altitude and seasonal transitions.
No plain water before six months. From six months, small amounts alongside meals, and how to check tap, bottled or filtered water for safety.
There is no skin-specific water target. Skin hydration follows general adequate intake, and moisturiser and barrier care work from the outside.
Looking for a quick answer? The hydration FAQ covers the questions we hear most.