Collagen Peptides

What it does

Collagen peptides are broken-down collagen protein, usually from bovine hide or fish skin, sold as powder. The body uses the amino acids (glycine, proline) as building blocks, including for skin and connective tissue.

What the research says

• May improve skin elasticity and hydration

  Evidence: moderate. Several RCTs show modest improvements in skin measures; effect sizes are small. Needs verification.

• May reduce joint discomfort

  Evidence: emerging. A few trials in athletes and osteoarthritis suggest benefit; preliminary. Needs verification.

DRAFT: real but modest effects in the best-studied area (skin); everything else is early.

What the experts say

Every position links to its source. We include skeptics alongside supporters.

• Layne Norton

  “When there is disagreement in the literature, I tend to default to the most tightly controlled well-done studies, and thus far, the most tightly controlled well-done studies show no effect.”

  Source Skeptical: citing tightly controlled studies showing no increase in connective tissue synthesis from collagen peptides, he calls collagen the least effective protein supplement and says he cannot recommend it, while allowing anecdotal joint pain relief.

• Bryan Johnson

  Source Takes 12.5g of collagen peptides every morning in his Longevity Mix, with his protocol citing benefits for skin health, joint health, and muscle recovery.

• Gary Brecka

  Source Includes one scoop of collagen per day as part of his daily foundational stack.

• Andy Galpin

  Source Recommends 10-15g of collagen peptides with 50mg of vitamin C taken 30-60 minutes pre-workout, per the compiled list of his public supplement recommendations.

Is it worth it?

DRAFT: the evidence is real but modest, and the monthly cost is high for what it delivers.