Peptide Research Guides
Side-by-side, evidence-ranked comparisons of research peptides organized by research goal. Every ranking is backed by peer-reviewed literature and graded by evidence quality.
Best Peptides for Weight Loss
Evidence-ranked comparison of 5 peptides, Semaglutide (Wegovy/Ozempic) ranked #1
Best Peptides for Recovery & Healing
Evidence-ranked comparison of 4 peptides, BPC-157 ranked #1
Best Peptides for Muscle Growth
Evidence-ranked comparison of 5 peptides, CJC-1295 + Ipamorelin ranked #1
Best Peptides for Testosterone
Evidence-ranked comparison of 4 peptides, Kisspeptin ranked #1
Best Peptides for Libido & Sexual Health
Evidence-ranked comparison of 4 peptides, PT-141 (Bremelanotide) ranked #1
Best Peptides for Cognitive Enhancement
Evidence-ranked comparison of 4 peptides, Semax ranked #1
Best Peptides for Anti-Aging
Evidence-ranked comparison of 4 peptides, Epithalon (Epitalon) ranked #1
Best Peptides for Sleep
Evidence-ranked comparison of 3 peptides, Ipamorelin + CJC-1295 ranked #1
Best Peptides for Endurance & Performance
Evidence-ranked comparison of 5 peptides, TB-500 (Thymosin Beta-4) ranked #1
Best Peptides for Immune Function
Evidence-ranked comparison of 4 peptides, Thymosin Alpha-1 ranked #1
Best Peptides for Skin Health
Evidence-ranked comparison of 3 peptides, GHK-Cu (Copper Peptide) ranked #1
Best Peptides for Gut Health
Evidence-ranked comparison of 3 peptides, BPC-157 ranked #1
Best Peptides for Women
Evidence-ranked comparison of 4 peptides, Semaglutide ranked #1
Best Peptides for Hair Growth
Evidence-ranked comparison of 4 peptides, GHK-Cu ranked #1
Best Peptides for Men
Evidence-ranked comparison of 4 peptides, Tesamorelin ranked #1
Best Peptides for Muscle & Fat Loss
Evidence-ranked comparison of 4 peptides, Tirzepatide ranked #1
Best Peptides for Non-Prescription Weight Loss
Evidence-ranked comparison of 4 peptides, Retatrutide ranked #1
Best Peptides for Skin Tightening
Evidence-ranked comparison of 4 peptides, GHK-Cu ranked #1
Best Peptides for Female Muscle Growth
Evidence-ranked comparison of 4 peptides, Tesamorelin ranked #1
Best Peptides for Weight Loss for Females
Evidence-ranked comparison of 4 peptides, Semaglutide ranked #1
Best Peptides for Women Over 50
Evidence-ranked comparison of 4 peptides, Semaglutide ranked #1
Best Peptides for Inflammation
Evidence-ranked comparison of 4 peptides, Thymosin Alpha-1 ranked #1
Best Peptides for Brain Function
Evidence-ranked comparison of 4 peptides, Cerebrolysin ranked #1
Best Peptides for Men Over 50
Evidence-ranked comparison of 4 peptides, Semaglutide ranked #1
Best Peptides for Energy
Evidence-ranked comparison of 4 peptides, Semaglutide ranked #1
Best Peptides for Fibromyalgia Research
Evidence-ranked comparison of 4 peptides, SS-31 (Elamipretide) ranked #1
Best Peptides for Nerve Regeneration
Evidence-ranked comparison of 4 peptides, SS-31 (Elamipretide) ranked #1
Best Peptides for Fatty Liver Research
Evidence-ranked comparison of 4 peptides, Tirzepatide ranked #1
Best Peptides for Appearance Research
Evidence-ranked comparison of 4 peptides, GHK-Cu ranked #1
Best Peptides for Menopause
Evidence-ranked comparison of 4 peptides, Semaglutide ranked #1
How We Grade Evidence
Evidence grades reflect the strength of published research only. Higher evidence grade does not mean a peptide is approved or safe for human use. Read our editorial standards.