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 (Stack) 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 4 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
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.