"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 ...

Medically reviewed by Allison Herries, RDNMedically reviewed by Allison Herries, RDN Hydroxymethylbutyrate (HMB), a byproduct of the body's leucine metabolism, is essential for protein metabolism, ...

We spoke with experts to find the best pure and effective creatine supplements. Here's what we recommend, whether you're ...

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 ...