The complete peptide directory
Research-grade reference pages for 20 of the most studied peptides — mechanism, dosing math, side effects, stacks, and FAQs. Updated with the latest peer-reviewed literature.
Healing & Recovery
BPC-157
A 15-amino-acid synthetic fragment of a protein found in gastric juice, studied for its broad systemic healing effects.
TB-500
A synthetic fragment of the naturally occurring protein Thymosin Beta-4, researched for tissue remodeling and recovery.
Growth Hormone
CJC-1295
A long-acting Growth Hormone Releasing Hormone (GHRH) analog studied for sustained GH and IGF-1 elevations.
Ipamorelin
A selective growth hormone secretagogue that mimics ghrelin to drive clean GH pulses without elevating cortisol or prolactin.
Sermorelin
A 29-amino-acid GHRH analogue studied for stimulating natural pituitary growth hormone release in a physiologic pulsatile pattern.
Tesamorelin
A synthetic GHRH analogue approved by the FDA for HIV-associated lipodystrophy, studied for visceral fat reduction and metabolic effects.
IGF-1 LR3
A long-acting analogue of IGF-1 with 83 amino acids, studied for tissue growth, muscle protein synthesis, and cellular recovery.
Skin & Hair
GHK-Cu
A copper-binding tripeptide studied extensively for skin regeneration, hair follicle health, and wound healing.
Melanotan II
A non-selective melanocortin receptor agonist studied for melanogenesis (skin tanning), appetite suppression, and sexual arousal.
Metabolic
Semaglutide
A long-acting GLP-1 receptor agonist studied for glycemic control and weight management.
Tirzepatide
A dual GIP/GLP-1 receptor agonist showing greater weight and HbA1c reductions than single-incretin therapies in head-to-head trials.
AOD-9604
A C-terminal fragment of human growth hormone studied for fat metabolism activity without the growth-promoting or glucose-altering effects of full HGH.
Retatrutide
An investigational triple agonist of GLP-1, GIP, and glucagon receptors studied for obesity and metabolic syndrome with the largest weight-loss signals in clinical trials to date.
Longevity
MOTS-c
A mitochondrial-derived peptide studied for metabolic regulation, insulin sensitivity, and exercise capacity.
Epitalon
A short tetrapeptide studied since the 1980s for telomerase activation and circadian/endocrine regulation.
NAD+
A central coenzyme studied for cellular energy production, DNA repair, and longevity signaling pathways like sirtuins.
Cognitive
Semax
A 7-amino-acid synthetic peptide derived from the ACTH(4-10) sequence, studied for cognitive enhancement, neuroprotection, and focus.
Selank
A synthetic heptapeptide analogue of tuftsin studied for anxiolytic effects, cognitive enhancement, and immunomodulation without sedation.
Sexual Health
Immune
New to peptides? Get our free Field Manual.
A 40-page PDF with reconstitution diagrams, a printable dose log, and one-page summaries of the 10 most-studied peptides.
Frequently asked questions
Which peptide should I research first?+
Start with BPC-157 and CJC-1295/Ipamorelin — they're the most-studied research peptides for recovery and growth-hormone work, with the largest body of literature and the clearest dosing guidance.
How are peptides categorized?+
PeptideHub organizes peptides into six functional categories: Healing & Recovery, Growth Hormone, Metabolic, Cognitive, Longevity, and Skin & Hair. Most peptides have effects across multiple domains, so categories reflect the dominant research use case.
What's the difference between a peptide and a protein?+
The line is fuzzy, but peptides are typically chains of 2–50 amino acids while proteins are larger and often folded into complex structures. Most therapeutic peptides are under 50 amino acids.