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Check for third-party testing and a clean ingredient list

Most patients return to normal activities right away

Key nutrients that help collagen work better: For collagen peptides to be used effectively by your body, certain cofactors must be present, such as vitamin C (required for collagen synthesis), zinc (coenzyme for fibroblast activity), copper (supports cross-linking of collagen fibers), and proline and glycine (building blocks of collagen)

Practical decision framing in the research-use community: if the research interest is structural repair, soft-tissue work, or skin remodeling alone, GLOW covers those bases