"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." ANYONE WHO SPENDS significant time in the gym is probably willing to admit that muscle building isn't ...

A board certified sports dietitian said BCAA, HMB, and beta-alanine supplements aren't necessary for muscle-building. BCAA supplements contain the same amino acids as protein-rich foods, and may be ...

Colino is a contributor for TIME. Colino is a contributor for TIME. Amino acid supplements have soared in popularity in recent years. Social-media influencers peddle them with promises that they’ll ...

There are about as many performance supplements on the market as there are protein-packed foods in a WH editor’s fridge. (Hint: It’s a lot.) A biggie as of late? Amino acids, which are the building ...

Amino acids are the building blocks of protein. These molecules come together to form proteins. Your body uses them for many important functions, such as making hormones, building muscle, and ...

Muscle-building supplements include protein and creatine which help build muscle mass. Beta-alanine is another supplement that may boost endurance and stamina. Branched-chain amino acids and ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? Nerd out with me for a sec about why amino supplements matter. They’re the ...

Amino acids are absolutely essential to our health—and for life itself. They are the so-called “building blocks” of proteins. They play a key role in the growth, repair, and maintenance of almost ...