Three things most people get wrong
Tap a card for the short, sourced answer.
Everyone needs 8 glasses of water a day
No study ever established this number. Needs vary with body size, climate, food and activity, and food and other drinks count too.
Source: Valtin H, Am J Physiol Regul Integr Comp Physiol, 2002.Cut 3,500 kcal and you lose exactly one pound
The rule treats the body as a fixed machine. In reality metabolism adapts as you lose weight, so progress slows over time. Plan around trends, not a single number.
Source: Hall KD et al., The Lancet, 2011.Online calorie formulas are exact
Mifflin-St Jeor is among the most accurate equations for healthy adults, yet individuals still differ by roughly 10 percent. Use the result as a starting point and adjust from real weight trends.
Source: Mifflin MD et al., Am J Clin Nutr, 1990.More tools, live now
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