“Peptide” can sound clinical on a skincare label, but a cosmetic is not automatically a drug and a scientific-sounding ingredient is not automatically a proven treatment.
Start with the claim
Health Canada says products are classified case by case using factors such as their claims, purpose, composition, and format. A cosmetic can describe appearance, while claims to modify body functions or prevent or treat disease may move a product into drug or natural-health-product territory.
Try the three-line label check
- What does the product actually promise?
- Is it presented as a cosmetic, or does it show a DIN or NPN?
- Does the evidence apply to the finished formula, or only to an ingredient in a different setting?
“Supports the look of smoother skin” and “rebuilds damaged tissue” are very different kinds of claim. Enjoy the serum if it suits you, but do not let packaging turn a cosmetic into imaginary medical care.
Sources: Health Canada: What is a cosmetic? and cosmetic advertising, labelling and ingredients.
Read a specific skincare question in more detail
The peptides versus retinol evidence comparison looks at actual human studies rather than declaring one ingredient category the winner. Our peptides and vitamin C explainer separates formulation research from universal mixing rules. The Argireline evidence review examines wrinkle studies and the limits of comparisons with injections.
Evidence companion: For molecule-specific evidence and Canadian authorization reporting, consult PeptideInfo.ca.
General education only. Source-based reporting, not individualized medical advice or clinician review.