Peptide glossary

Peptide Glossary

Plain-English definitions of the core terminology behind peptide science — mechanisms, receptors, delivery, and pharmacology.

The building blocks of peptides and proteins.

Formation of new blood vessels from existing vasculature.

Bacteriostatic Water

Sterile water with 0.9% benzyl alcohol used to reconstitute peptides.

BDNF (Brain-Derived Neurotrophic Factor)

Growth factor supporting neuron survival and plasticity.

Bioavailability

Fraction of a dose reaching systemic circulation intact.

Cellular Senescence

Permanent cell cycle arrest contributing to aging.

Most abundant structural protein in the body.

Compounding Pharmacy

Licensed pharmacy that prepares custom formulations.

Cleared by the U.S. FDA for specific indications.

Tripeptide Gly-His-Lys, base of copper-binding GHK-Cu.

Hunger hormone that also stimulates GH release.

GHRH (Growth Hormone-Releasing Hormone)

Hypothalamic peptide that triggers pituitary GH release.

GIP (Glucose-Dependent Insulinotropic Peptide)

Incretin hormone paired with GLP-1 in dual agonists.

GLP-1 (Glucagon-Like Peptide-1)

Incretin hormone regulating glucose and appetite.

Growth Hormone Secretagogue

A compound that stimulates endogenous GH release.

Time for a substance to fall to half its concentration.

Ipamorelin GHRP

Selective ghrelin mimetic with minimal cortisol/prolactin side effects.

Freeze-dried peptide powder for long-term stability.

Receptor system regulating pigmentation, libido, and inflammation.

Cellular powerhouses producing ATP via oxidative phosphorylation.

A compound studied for cognitive enhancement.

A short chain of amino acids linked by peptide bonds.

Mixing lyophilized peptide with sterile diluent.

Injection into the fatty tissue beneath the skin.

Subcutaneous Injection

Standard delivery route for most research peptides.

Family of immune and tissue-repair peptides from the thymus.