Collagen Protein

Collagen is protein derived from animal connective tissue, popular in "beauty" and "joint" products. The one fact that governs how we cover it: collagen is an incomplete protein, low in some essential amino acids, so it scores near the bottom on protein-quality scales like PDCAAS and cannot substitute gram-for-gram for whey or soy as a general protein source. That is a statement about the amino profile, not a verdict on any specific benefit claim — which we neither endorse nor make. If your protein goal is total intake, read the amino profile before paying a premium.