do collagen peptides count as protein?

Ethan hit the nail on the head. Biochemically, it’s protein, but functionally, it serves a different purpose.
When I formulate a meal replacement or a sports powder, I never use collagen as the primary protein source due to its biased amino acid profile. Instead, I use it synergistically. We often blend high-quality collagen peptides with a complete protein like whey isolate or a pea/rice protein blend. This way, the client can make a “High Protein” claim on the front of the packaging while also offering the functional joint and skin benefits of collagen.