Peptides
Peptides, decoded.
What each peptide actually does, the strength of the evidence behind it, and where it sits in the current regulatory picture — written specifically for women researching peptide therapy.
Last reviewed · Regulatory information current as of September 2026
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Libido
Hormone & GH-axis
CJC-1295
A long-acting GHRH analog used to elevate endogenous growth hormone and IGF-1.
Research-onlyIpamorelin
A selective growth-hormone secretagogue that stimulates pituitary GH release with minimal cortisol or prolactin elevation.
Research-onlyKisspeptin
A neuropeptide that regulates GnRH release at the top of the reproductive hormone axis.
Research-onlySermorelin
A GHRH analog used to stimulate the body's own growth hormone production.
Compounded
Skin & collagen
Argireline (Acetyl Hexapeptide-8)
A topical peptide that aims to soften expression lines by interfering with the neurotransmitter release that drives muscle contraction.
Cosmetic ingredientCollagen Peptides
Hydrolyzed collagen — short collagen-derived peptides taken orally, studied for skin elasticity and connective-tissue support.
Dietary supplementGHK-Cu
A copper-binding tripeptide central to tissue regeneration and skin repair.
Research-onlyPalmitoyl Peptides (Matrixyl)
A family of collagen-signaling peptides used in anti-aging serums to prompt skin fibroblasts to produce more collagen.
Cosmetic ingredient