36 peptides reviewed8 categories5 authorized in Canada0 sellers or affiliate links
Quick answer: are peptides legal in Canada? Peptides authorized by Health Canada (insulin, semaglutide, tirzepatide and others) are legal prescription drugs. Unauthorized peptides like BPC-157, TB-500 and retatrutide are illegal to sell or advertise, even when labelled "research use only". Read the full explainer →
What are peptides?
Peptides are short chains of amino acids, the building blocks of proteins. Your body makes many of them, including hormones like insulin and oxytocin. Some peptide drugs are among the most important medicines in use; many peptides sold online have never been tested properly in people.
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Weight loss & GLP-1GLP-1 drugs like semaglutide and tirzepatide are among the best-studied peptides in medicine. Others marketed for fat loss are not authorized in Canada.7 peptides 
Growth hormonePeptides and one non-peptide (MK-677) that push the body to release more growth hormone. Almost none are authorized in Canada.7 peptides 
Healing & recoveryBPC-157 and TB-500 are heavily promoted for injuries. The human evidence is very thin.2 peptides 
Brain & sleepSemax, Selank, Dihexa, Cerebrolysin and DSIP: mostly Russian or animal research, none authorized in Canada.5 peptides 
Skin & cosmeticCopper peptides, Matrixyl, Argireline and collagen peptides: the legal, over-the-counter corner of the peptide world.4 peptides 
Sexual healthPT-141, melanotan, kisspeptin and oxytocin: from an FDA-approved drug to unauthorized tanning injections.4 peptides 
LongevityEpitalon, MOTS-c, humanin and SS-31: interesting biology, very little human evidence (one US approval for a rare disease).4 peptides 
ImmuneThymosin alpha-1, LL-37 and KPV: approved abroad, tested in small trials, or only studied in mice.3 peptides Most searched peptides
BPC-157The most-searched "healing peptide". Animal studies are plentiful, but a 2026 systematic review found only 3 tiny human…Not authorized in Canada
SemaglutideA GLP-1 receptor agonist peptide drug for type 2 diabetes and chronic weight management. In Canada it is a prescription…Authorized in Canada (prescription)
TirzepatideA dual GIP/GLP-1 receptor agonist. Health Canada has authorized Mounjaro for type 2 diabetes and Zepbound for chronic…Authorized in Canada (prescription)
RetatrutideAn investigational triple-hormone (GIP, GLP-1, glucagon) receptor agonist from Eli Lilly. It is not approved anywhere,…Not authorized in Canada
GHK-Cu and Copper PeptidesA natural copper-binding tripeptide used in skin and hair-care products. As a cosmetic cream it's an ordinary…Topical cosmetic: sold legally · Injectable: not authorized
TB-500 and Thymosin Beta-4TB-500 is a synthetic fragment of thymosin beta-4, a natural repair-related peptide. Eye-drop forms of Tβ4 have been in…Not authorized in Canada
MK-677 (Ibutamoren)MK-677 is often lumped in with peptides, but it is an oral non-peptide drug that acts on the ghrelin receptor. A…Not authorized in Canada
Epitalon (Epithalon)A 4-amino-acid peptide based on a pineal gland extract, promoted for "telomere" anti-ageing. Research comes largely…Not authorized in Canada
SemaxA synthetic fragment of the hormone ACTH used as a nasal medicine in Russia, mainly after stroke. Evidence for…Not authorized in Canada
Collagen PeptidesHydrolyzed collagen powders and capsules taken by mouth. Meta-analyses find modest improvements in skin hydration and…Sold legally as food / natural health product
PT-141 (Bremelanotide)A melanocortin-receptor drug approved by the FDA in 2019 as Vyleesi for low sexual desire in premenopausal women. We…Not authorized in Canada (approved elsewhere)
CJC-1295A long-acting analog of growth hormone-releasing hormone (GHRH). Small human studies exist; it was never approved.…Not authorized in CanadaHow we rate evidence
4/4 · Large randomized trialsBig randomized human trials, reviewed by regulators.
3/4 · Some randomized trialsSome randomized human trials, for specific uses.
2/4 · Small human studiesSmall or lower-quality human studies.
1/4 · Cell & animalAlmost entirely lab-dish or animal studies.