Peptide research
Every peptide graded by how much real evidence exists, with a one-click live search of the scientific literature. We point you to the primary sources — reporting only, never medical advice.
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Studies cited
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Peptides graded
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Strong-evidence peptides
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Co-stack pairs
How we grade the evidence
Strong human / clinical evidence
Good human evidence
Moderate — some human data
Limited — mostly preclinical
Anecdotal — little human data
Retatrutide
Weight loss · GLP-1 & Metabolic
Good human evidence; well-studied with supportive trials.
GHK-Cu
Skin healing · Cosmetic & Skin
Good human evidence; well-studied with supportive trials.
PT-141 (Bremelanotide)
Libido · Sexual Health
Good human evidence; well-studied with supportive trials.
Thymosin Alpha-1
Immunity · Immune
Good human evidence; well-studied with supportive trials.
Oxytocin
Mood / bonding · Hormone & Fertility
Good human evidence; well-studied with supportive trials.
BPC-157
Tissue repair · Healing & Recovery
Moderate evidence — some human data, more preclinical.
Ipamorelin
GH support · GH Secretagogue
Moderate evidence — some human data, more preclinical.
NAD+
Energy / longevity · Longevity
Moderate evidence — some human data, more preclinical.
CJC-1295 (with DAC)
GH support · GH Secretagogue
Moderate evidence — some human data, more preclinical.
Elamipretide (SS-31)
Mitochondrial · Longevity
Moderate evidence — some human data, more preclinical.
Glutathione
Antioxidant · Longevity
Moderate evidence — some human data, more preclinical.
Sermorelin
GH support · GH Secretagogue
Moderate evidence — some human data, more preclinical.
Gonadorelin
Fertility support · Hormone & Fertility
Moderate evidence — some human data, more preclinical.
Kisspeptin
Fertility / hormone · Hormone & Fertility
Moderate evidence — some human data, more preclinical.
TB-500 (Thymosin β4)
Recovery · Healing & Recovery
Limited evidence — mostly preclinical (animal / lab).
Semax
Focus · Cognitive
Limited evidence — mostly preclinical (animal / lab).
MOTS-c
Metabolic / energy · Longevity
Limited evidence — mostly preclinical (animal / lab).
Selank
Calm / anxiety · Cognitive
Limited evidence — mostly preclinical (animal / lab).
5-Amino-1MQ
Metabolic · Fat Loss
Limited evidence — mostly preclinical (animal / lab).
KPV
Gut / inflammation · Healing & Recovery
Limited evidence — mostly preclinical (animal / lab).
Epithalon
Longevity · Longevity
Limited evidence — mostly preclinical (animal / lab).
DSIP
Sleep · Sleep
Limited evidence — mostly preclinical (animal / lab).
Melanotan II
Tanning · Sexual Health
Limited evidence — mostly preclinical (animal / lab).
IGF-1 LR3
Growth · GH Secretagogue
Limited evidence — mostly preclinical (animal / lab).
LL-37
Antimicrobial · Immune
Limited evidence — mostly preclinical (animal / lab).
AOD-9604
Fat loss · Fat Loss
Limited evidence — mostly preclinical (animal / lab).
Dihexa
Cognition · Cognitive
Anecdotal — little to no published human research.
Follistatin
Muscle · Healing & Recovery
Anecdotal — little to no published human research.
Semaglutide
Weight loss · GLP-1 & Metabolic
Strong human / clinical evidence, including approved indications.
Tirzepatide
Weight loss · GLP-1 & Metabolic
Strong human / clinical evidence, including approved indications.
Tesamorelin
Visceral fat · GH Secretagogue
Strong human / clinical evidence, including approved indications.
Liraglutide
Weight loss · GLP-1 & Metabolic
Strong human / clinical evidence, including approved indications.
Showing 32 of 32 peptides. “Browse studies” runs a live search on Europe PMC.
Reporting only
Evidence grades summarize how much research exists, not whether a compound is safe or effective for you. Read the primary sources and consult a licensed professional. Not medical advice.