Collagen extract is a structural protein, typically sourced from animal tendon, skin, cartilage, or bone, that's purified for cosmetic use to isolate the pure protein. Rather than rebuilding skin's own collagen, its main role topically is as a humectant. It helps prevent transepidermal water loss, or TEWL, leaving skin looking hydrated, refreshed, and more supple.
It's also used to improve the texture of a formula itself. Depending on what a product is trying to achieve, collagen extract typically shows up at concentrations between 0.5% and 5%.
Collagen Extract References
Current Issues in Molecular Biology, March 2024, pages 2,,043-2070 | Sustainable Chemistry and Pharmacy, December 2020, ePublication | Aquaculture, January 2020, ePublication
Our team reviews ingredient research and uses up-to-date evidence to rate ingredients based on the categories below.
Best
Ingredients with the most rigorous and convincing evidence. These are the standouts backed by consistent findings across independent, peer reviewed clinical research.. When we call an ingredient Best, it has earned that distinction through genuine, reproducible proof that it improves skin.
Good
Reliable, well tolerated ingredients that do their job without complaint. They may not carry the headline benefits of a Best rated active, but they hydrate, stabilize a formula, or support the ingredients around them in ways that make a real difference in how a product performs and feels.
Average
Ingredients that are perfectly safe and serve a clear function, typically as an emollient, thickener, or filler, but do not offer any meaningful skin benefit beyond that basic job. Not a red flag, just not a reason to choose one product over another.
Bad/Worst
Ingredients with documented potential to irritate skin, disrupt the barrier, or trigger sensitization in some users, often synthetic fragrance, drying forms of alcohol, or certain essential oils. Not automatically a dealbreaker for every skin type, but worth knowing about before you commit to a product.
