Hydrolyzed collagen powders and capsules taken by mouth. Meta-analyses find modest improvements in skin hydration and elasticity, with study-quality caveats.
How strong is the human evidence?
- Cell & animal
- Small human studies
- Some randomized trials
- Large randomized trials
What is Collagen Peptides?
Collagen peptides are collagen broken down (hydrolyzed) into small peptides, usually from bovine, porcine or marine sources.
Is Collagen Peptides legal in Canada?
Sold legally. Health Canada says peptide products may be regulated as natural health products depending on use, composition and route, and authorized natural health products carry an 8-digit NPN.
What the research shows
- Pu et al. (Nutrients 2023): meta-analysis of 26 RCTs (1,721 participants) found improved skin hydration and elasticity vs placebo, but noted several biases in the trials.
- Nukaly et al. (2026): meta-analysis of 19 RCTs found oral peptides improved hydration and brightness, with a modest effect on wrinkles.
What it doesn't show
- The 2023 authors said larger trials are needed. Evidence for joints, hair and weight loss is separate and not reviewed here.
Common questions
Are collagen peptides legal in Canada?
Yes, they are widely sold. Look for an NPN on products that make health claims.
Do collagen peptides work for skin?
Meta-analyses show modest benefits for hydration and elasticity, with trial-quality caveats.
Collagen peptides vs injectable peptides?
Collagen peptides are oral, food-derived supplements; injectable peptides like BPC-157 are unauthorized drugs. They are very different.
Sources
- Health Canada — Peptides: Regulations and enforcement
- Pu SY et al. Effects of oral collagen for skin anti-aging: SR and meta-analysis. Nutrients 2023
- Nukaly HY et al. Oral and topical peptides for skin aging. Front Med 2026
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