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supplement Cosmetic & Skin

Collagen Peptides

also known as: Hydrolyzed Collagen, Collagen Hydrolysate, Collagen Protein

The world's most-consumed peptide supplement — hydrolyzed collagen fragments with documented effects on skin elasticity, joint comfort, and bone density in clinical trials.

A heterogeneous mixture of short peptide fragments (primarily Gly-Pro-Hyp tripeptide repeats) produced by enzymatic hydrolysis of native collagen, orally bioavailable and shown in RCTs to increase dermal collagen density and reduce joint pain.

Mechanism of action

Orally ingested collagen peptides are partially digested to dipeptides and tripeptides (primarily Pro-Hyp and Hyp-Gly) that are absorbed intact via PepT1 transporter. These fragments stimulate fibroblast proliferation and collagen/hyaluronic acid synthesis in dermal tissue, and may stimulate chondrocyte activity in cartilage. The Pro-Hyp dipeptide acts as a bioactive signaling molecule, not merely a protein source.

Primary uses

  • Skin elasticity and hydration (oral supplement)
  • Joint pain and osteoarthritis symptom reduction
  • Bone mineral density support
  • Nail and hair strength

Typical dosing

5–15 g daily (oral)

Most clinical trials use 2.5–10 g/day. Type I and III collagen sourced from bovine/marine for skin; Type II for joints. Effects typically emerge after 4–12 weeks.

Regulatory status

Sold as a dietary supplement (GRAS status) in the US. Not FDA-approved as a drug for any indication. Subject to DSHEA regulations, not drug approval standards.

References

  1. [clinical-trial] Proksch E, et al. "Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study." Skin Pharmacol Physiol, 2014;27:47-55.
  2. [review] de Miranda RB, et al. "Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis." Int J Dermatol, 2021;60:1449-1461.

Related peptides

GHK-Cu

A naturally occurring human tripeptide-copper complex with extensive topical cosmetic evidence and strong in-vitro data on collagen synthesis, angiogenesis, and anti-inflammatory signaling.

Matrixyl

A palmitoylated pentapeptide derived from a collagen-I breakdown fragment (KTTKS) — widely used in cosmetic topicals with clinical data supporting modest reductions in fine-line depth over 12 weeks.

Pentapeptide-3

Vialox — the "curare-mimetic" cosmetic peptide (GPRPA). Acts post-synaptically on peripheral nicotinic ACh receptors, unlike the pre-synaptic SNAP-25-mimetic Argireline class. Sometimes marketed as a snake-venom-inspired Botox alternative; efficacy data are primarily from the manufacturer.

Hyaluronic Acid

A naturally-occurring glycosaminoglycan, injectable cross-linked forms of which are the most-used dermal fillers worldwide and are FDA-approved for osteoarthritis-related knee pain.
Disclaimer

This entry is for educational purposes only and does not constitute medical advice. Dosing information reflects published regulatory or research data and is not a recommendation. Many compounds described here are not approved for human use in the United States. Consult a licensed medical professional before considering any peptide therapy.