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Browse all expert articles, guides, and tools related to Healthy Lifestyle.
"Drink 8 glasses a day" is everywhere — but it has no scientific basis. Your actual water needs depend on your body weight, activity level, climate, and diet. Here is the formula and a table that tells you your exact target.
The answer to "how many calories per day" is not the same for everyone. Your TDEE — Total Daily Energy Expenditure — depends on your weight, height, age, sex, and activity level. Here is the exact formula and tables by goal.