The Complete Guide to Whey Protein

Most people shop for whey protein like they invest in Bitcoin—they’re not exactly sure what it is, but they know they need it.

Fortunately, unlike the stock market, adding whey to your diet is a pretty safe bet if you’re looking to support muscle gain and fat loss. Find out the facts about whey—from its origins to its benefits and the many varieties it’s available in—with this guide to the world’s most popular muscle supplement.