Types I, II and III collagen do different jobs, and marine and bovine sources are not interchangeable. Here is what the clinical evidence shows on dosage, bioavailability and timeline — and how to pick a supplement that matches your actual goal.

Among all amino acids, L-Lysine plays one of the most crucial roles. It’s an essential amino acid, meaning your body can’t produce it on its own — it must come from diet or supplementation. Foods like legumes, quinoa, lentils, and certain nuts contain some L-Lysine, but for many people, daily intake falls short of what’s needed for optimal collagen support.