Leucine is the amino acid that signals your muscles to start repairing and growing. Here’s why it matters.

Cold cosmic dust grains can link amino acids into protein‑like chains in deep space, suggesting life’s chemistry may begin ...

Many people still don’t understand how protein works, why it matters or the best ways to get enough of it in their diet. Here's what to know.

The answer may surprise you.

Protein is everyone's favorite macronutrient right now. But focusing on the grams you get in a day isn't enough, dietitians say. You should also make sure to vary your protein sources so that you get ...

Emerging research suggests that protein consumption could also affect mood, says a nutritionist — here’s how.

The first thing they noticed was that the infected mice were not eating as much—a sign of likely metabolic changes.

A dietitian explains how much protein you need per day, whether too much protein is harmful, and what to watch for, such as digestive issues and hydration.

Astronomers use the term dark energy to refer to energy in the universe that is unaccounted for by ordinary matter but ...