Daily diets vary considerably around the world.

The recommended target for protein intake increased from 0.8 g/kg/day to 1.2-1.6 g/kg/day in 2026. Individual protein requirements vary by age, sex, and physical activity.

You may have noticed that as the years go by, you either need to eat less or move more to feel and look your best. That's because calorie requirements change by age, with your metabolism beginning to ...

A calorie deficit is necessary to lose weight, which you can achieve by eating less or exercising more. The Mifflin St. Jeor equation estimates how many calories your body needs to function at rest.

Intermittent fasting and calorie deficits can both be used for weight management and fat loss—in most cases, the most effective eating plan is one you're able to adhere to long term.