Research directory
Peptide compounds, organized by evidence and regulatory status
A curated reference of peptide research compounds drawn from public biomedical databases. Each entry lists mechanism summaries, regulatory status, evidence quality, safety flags, and links to peer-reviewed literature — never dosing, protocols, or sourcing.
P21
Nootropic & Neuropeptides reference entry
Synthetic peptide analog of ciliary neurotrophic factor (CNTF). Animal models only.
PE-22-28
Nootropic & Neuropeptides reference entry
Spadin analog and TREK-1 modulator studied in rodent depression models.
PT-141
Bremelanotide
Melanocortin (MC4R) agonist acting centrally. FDA-approved as Vyleesi for hypoactive sexual desire disorder (HSDD) in premenopausal women.
Palmitoyl Tetrapeptide-7
Skin, Hair & Aesthetic reference entry
Cosmetic peptide studied for IL-6 modulation in keratinocyte models; used in topical anti-aging blends.
Palmitoyl Tripeptide-1
Pal-GHK
Lipopeptide cosmetic ingredient studied for collagen-signaling activity in topical anti-aging products.
Retatrutide
Metabolic & GLP-1/GIP Agonists reference entry
Investigational triple agonist (GLP-1 / GIP / glucagon receptors) currently in Phase 3 development.
SNAP-8
Skin, Hair & Aesthetic reference entry
Extended octapeptide analog of Argireline marketed in topical cosmetic preparations.
SS-31
Elamipretide
Mitochondrially targeted cardiolipin-binding peptide studied in Phase 2 trials for heart failure, kidney injury, and primary mitochondrial myopathy.
Selank
Nootropic & Neuropeptides reference entry
Synthetic tuftsin analog approved in Russia for generalized anxiety. Limited Western-standard clinical evidence.
Semaglutide
Metabolic & GLP-1/GIP Agonists reference entry
Long-acting GLP-1 receptor agonist studied extensively in type 2 diabetes and chronic weight management.
Semax
Met-Glu-His-Phe-Pro-Gly-Pro
Synthetic heptapeptide analog of an ACTH fragment, approved in Russia for stroke and cognitive indications. Small human neuroimaging studies exist; no...
Sermorelin
GHRH(1-29)
Synthetic analog of the first 29 amino acids of GHRH. Previously FDA-approved as Geref for pediatric growth hormone deficiency; commercial product...
TB-500
Thymosin Beta-4 Synthetic Fragment
Parent protein Thymosin Beta-4 is studied for actin sequestration, cell migration, and wound healing. The marketed "TB-500" fragment lacks the parent...
Tesamorelin
Growth Hormone Secretagogues reference entry
GHRH analog with a stabilized N-terminus. FDA-approved as Egrifta specifically for the reduction of excess abdominal fat in HIV-infected patients with...
Thymalin
Thymic peptide bioregulator extracted from calf thymus.
Thymic peptide complex with limited Eastern European clinical reports in elderly and immunocompromised populations.
Thymosin Alpha-1
Thymalfasin
Modulates T-cell function and innate immunity. Studied as an adjunct in chronic hepatitis B/C and sepsis.
Tirzepatide
Metabolic & GLP-1/GIP Agonists reference entry
Dual GLP-1/GIP receptor agonist FDA-approved for type 2 diabetes and chronic weight management.