Collagen: What It Is, Forms, Cautions, and Clean Brands

Collagen is protein peptides from animal connective tissue. It supports healthy skin, hair, nails, and joints.*

Forms and what to look for on the label

Type I and III (common in bovine and marine sources) for skin. Type II for joints. Hydrolyzed peptides mix easily.

Before you take it

It isn’t vegan. Protein-based powders can contain heavy metals, which is why third-party testing matters.