Best Collagen Supplements

Marine collagen and bovine collagen are both effective sources of type I collagen, which is the primary type found in skin and bones. Marine collagen peptides tend to have a slightly lower molecular weight, which may offer marginally better absorption, but clinical differences between the two sources are not well established. Marine collagen is often preferred by people who avoid beef for dietary or religious reasons, while bovine collagen is typically more affordable and widely available. The most important factor is the quality of hydrolysis and peptide size rather than the animal source itself.

Traditional diets that included bone broth, organ meats, and skin-on cuts of meat provided meaningful amounts of collagen. However, modern Western diets tend to be low in these foods, making supplementation a practical alternative. Bone broth can provide collagen, but the amount varies widely depending on preparation method, cooking time, and source, making it difficult to achieve the consistent daily doses used in clinical studies. Collagen supplements offer a standardized, convenient way to ensure you are getting a clinically relevant amount each day.

Some clinical evidence supports the use of collagen peptides for hair and nail health, although the research is less extensive than for skin and joints. A 2017 study published in the Journal of Cosmetic Dermatology found that women taking 2.5 g of specific bioactive collagen peptides daily for 24 weeks experienced a 12% increase in nail growth rate and a 42% decrease in broken nails. For hair, collagen provides amino acids like proline that are building blocks for keratin, the primary protein in hair. While promising, more large-scale studies are needed to confirm these benefits.

Yes, taking collagen with vitamin C is strongly recommended by researchers and practitioners. Vitamin C is an essential cofactor for the enzymes prolyl hydroxylase and lysyl hydroxylase, which are required for proper collagen synthesis and cross-linking in the body. Without adequate vitamin C, the body cannot effectively use the collagen peptides you consume to build new collagen fibers. A dose of 50–100 mg of vitamin C taken alongside your collagen supplement is sufficient to support this process. Some collagen products already include vitamin C in their formulation for this reason.