Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Bovine collagen is used in supplements aimed at supporting hair health, primarily due to its high content of amino acids, especially glycine and proline, which are important for the structure of various tissues, including hair. Scientific evidence supporting its direct benefit for hair growth or hair health is limited, but some mechanistic rationale exists. Collagen provides the building blocks for keratin, the main protein in hair. Several small-scale studies and animal research suggest that collagen peptides may improve dermal and hair follicle health by promoting extracellular matrix synthesis and supporting the skin environment where hair follicles reside. For example, a few studies indicate that collagen supplementation can improve skin elasticity and hydration, which might indirectly benefit hair anchorage and growth. However, direct, robust, human clinical trials specifically measuring the impact of bovine collagen on hair growth, thickness, or strength are sparse.

The use of bovine collagen for hair is thus justified by a modest degree of scientific plausibility and limited preliminary evidence, but not by strong clinical data. Most claims are extrapolated from collagen’s effects on skin or general connective tissue rather than demonstrated hair-specific outcomes. Therefore, the evidence level is rated as 2/5: there is some scientific rationale and early evidence, but not enough to confirm a consistent, significant benefit for hair health.

More about bovine collagen
More about Hair

Other ingredients that support Hair

Other body systems supported by bovine collagen

Products containing bovine collagen