New calorie-tracking apps with A.I. promise better accuracy. But researchers who study calories say that there’s a better, ...

You can count macronutrients with apps or a written food diary. Learn how to count macros if you’re trying to lose weight or gain muscle.

Though it might feel great to finish a workout and see "calories burned" pop up on your smartwatch, that number is often surprisingly inaccurate, with estimated error rates of 30%–80%. The watch's ...

I wanted something practical, not extreme. An AI-powered diet plan helped me drop 21 kilos in 10 months.