There are thousands of options that promise to boost your fitness. Only a handful are backed by solid evidence.

For the last two weeks, I have written about carbohydrates and fats. This week I am covering protein, another essential macronutrient in your diet.

For decades, amino acids have been added to medical formulations like insulin as stabilizers: these small molecules keep ...

Biologists have long known that amino acids can help stabilize proteins, for example as additives to pharmaceutical formulations. In trying to understand why this works, EPFL and MIT researchers have ...

Stop wasting your money on supplements that don’t work. We reveal the 5 best supplements for exercisers and 5 that don’t live ...

The now-omnivorous dog is descended from a carnivorous species, but has since evolved to metabolize carbohydrates, fat, and ...

Sucralose, the sugar substitute in many diet products, may weaken cancer immunotherapy by altering gut bacteria and reducing arginine levels needed for immune cells. But supplementation with arginine ...

Plant-based dry foods can deliver nutrition comparable to meat-based products, but most fall short of what's needed.

Discover the best protein powders of 2025. Expert-tested picks for whey, plant, casein, and collagen to support muscle, ...