Research reference
A scientific reference for research peptides.
PeptideCodex catalogs peptide profiles, published animal-study dosing ranges, reconstitution calculators, and stack references — organised for scientific readers, not patients.
Featured peptides
View all →AOD-9604
A 16-amino-acid modified fragment of the C-terminus of human growth hormone (residues 176–191) with an added N-terminal tyrosine, characterised as a lipolytic peptide.
BPC-157
A synthetic 15-amino-acid peptide fragment derived from a protein found in gastric juice. Studied extensively in animal models for tissue repair, gut-barrier integrity, and tendon/ligament healing.
CJC-1295 with DAC
A growth-hormone-releasing hormone (GHRH) analogue with a maleimide (Drug Affinity Complex) linker that binds serum albumin, extending its circulating half-life to several days.
DSIP
A nonapeptide originally isolated from rabbit brain during electrophysiological sleep-induction experiments; characterised in the sleep, stress, and neuroendocrine research literature.
Epithalon
A synthetic tetrapeptide derived from pineal-gland extract characterised in Russian gerontology research for telomerase-related and geroprotective effects.
GHK-Cu
A naturally occurring copper-binding tripeptide characterised in the research literature for effects on skin remodelling, wound repair, and hair-follicle biology.
Research stacks
View all →Cognitive Stack
Neuropeptide research — pairing the anxiolytic tuftsin-derived Selank with the neurotrophic ACTH-fragment Semax, the two most commonly discussed peptides in the Russian nootropic research tradition.
GH Pulse Stack
Growth-hormone axis stimulation research — a GHRH analogue combined with a selective ghrelin-receptor agonist to engage two independent GH-release pathways.
Injury Recovery Foundation
Tissue-repair research (tendon, ligament, muscle, gut mucosa) — combining a short-acting locally-active peptide with a longer-acting systemic one.
Longevity Foundation
Cellular energetics and senescence research — pairing a mitochondrial-derived peptide with a pineal tetrapeptide and NAD+ precursor availability, three axes commonly discussed together in the longevity research literature.
Metabolic Research Stack
GLP-1 receptor engagement for metabolic-endpoint research — semaglutide as the reference agonist, with tirzepatide discussed as a dual GLP-1/GIP comparator once the profile is added.
Sexual Health Research Stack
Melanocortin sexual-health research — using PT-141 as the primary reference peptide with notes on the non-selective precursor melanotan-II.
Skin & Repair Stack
Skin-remodelling and wound-repair research — combining a copper tripeptide characterised in dermatology models with a pentadecapeptide characterised in tissue-repair models.
Sleep Research Stack
Sleep architecture and nighttime GH-pulse research — pairing the pineal-linked DSIP with a short-acting GHRH analog administered at bedtime.
What this site is — and isn't
PeptideCodex is: a structured reference of peptides that appear in the scientific literature. Each profile documents mechanism, published half-life, reported dosing ranges from preclinical work, reconstitution math, and citations.
PeptideCodex is not: a medical resource, a source of treatment protocols, a pharmacy, or a recommendation to use any compound in humans. We do not employ physicians and do not offer medical review of content.
Read our editorial policy for how sources are handled.