Endocrine & immune signalling
Foundational Peptides in Canada
3 compounds in stock
Foundational covers compounds studied at the upstream signalling level — the HPG axis, melanocortin receptors, and immune modulation — rather than a downstream performance endpoint. These sit apart from the other categories because their research context is the regulatory system itself. Priced and shipped in CAD, for laboratory and research use only.
Foundational — for sale
HPG-axis signalling
Kisspeptin sits at the top of the hypothalamic-pituitary-gonadal cascade, studied as an upstream regulator of GnRH release. That places it above the compounds it is usually grouped with — hCG, for instance, acts as an LH analogue further down the same axis.
Melanocortin receptor research
PT-141 (bremelanotide) is a melanocortin receptor agonist with MC4R selectivity, studied around central rather than peripheral signalling. It shares a receptor family with Melanotan 2 but differs in selectivity, which is why the two are catalogued separately rather than as variants of one compound.
Immune modulation
Thymosin alpha-1 is a thymic peptide studied around T-cell maturation and immune signalling. It is mechanistically unrelated to TB-500 despite the shared thymosin name — TB-500 is a thymosin-β4 fragment studied around actin remodelling and sits under recovery. The naming overlap is a common source of confusion.
Further reading
PT-141 (Bremelanotide) — a research overview
A research overview of the PT-141 peptide (bremelanotide): MC4R mechanism, RECONNECT Phase 3 trial data, pharmacokinetics, and the tolerability limits reported in the published literature.
Kisspeptin — a research overview
A measured research overview of the kisspeptin peptide: its role upstream of GnRH in the HPG axis, the kisspeptin-10 vs kisspeptin-54 human trial data, and honest caveats on data maturity.
Thymosin Alpha-1 — a research overview
28-aa thymic peptide driving T-cell and NK-cell immunity, with established clinical use in hepatitis and emerging COVID-era research.
Foundational peptides FAQ
- What are foundational peptides?
- Foundational peptides are compounds studied at the upstream signalling level — endocrine axis regulation and immune modulation — rather than for a downstream performance endpoint. Kisspeptin, PT-141 and thymosin alpha-1 are the compounds catalogued here.
- Is thymosin alpha-1 related to TB-500?
- No, despite the shared name. Thymosin alpha-1 is a thymic peptide studied around T-cell maturation and immune signalling. TB-500 is a thymosin-β4 fragment studied around cell migration and actin remodelling, and is catalogued under recovery.
- How is PT-141 different from Melanotan 2?
- Both are melanocortin receptor agonists, but they differ in selectivity. PT-141 (bremelanotide) has MC4R selectivity and is studied around central signalling; Melanotan 2 is non-selective and is studied around melanogenesis, which places it in the skin category.
- Can I buy kisspeptin in Canada?
- Yes. Research-grade kisspeptin 10 mg is available from Canada Peptides, priced in CAD and shipped within Canada, for laboratory and research use only.
- Are these research use only?
- Yes. Everything in this category is supplied strictly for laboratory and research use. Nothing on this page is medical advice or a therapeutic claim.
Other categories
- CognitiveSemax, Selank, Cerebrolysin — neuropeptides studied around BDNF signalling and attention.
- EnergyMOTS-c and SLU-PP-332 — mitochondrial-derived signalling and ERR agonism.
- RecoveryBPC-157, TB-500, KPV and glutathione — angiogenic, cytoskeletal and anti-inflammatory pathways.
- SleepDSIP — the delta sleep-inducing peptide, studied around slow-wave sleep architecture.
- MetabolicRetatrutide, semaglutide, tirzepatide and more — GLP-1, GIP and glucagon receptor research.
- LongevityCJC-1295, ipamorelin, GHRP-2/6, epithalon and NAD+ — GH-axis and cellular-ageing research.
- SkinGHK-Cu, GLOW, KLOW and Melanotan 2 — copper-peptide and melanocortin research.
Research & educational use only. This page is informational and does not constitute medical advice or a therapeutic claim.