Compare peptides
Put up to three compounds side by side: evidence, approval and sport status, dose, cycle, half-life and the main cautions. Below the tool, written comparisons cover the pairs people ask about most.
Choose up to three compounds to see them side by side.
Written comparisons
Pages for the pairs people ask about most: the key differences with evidence tags, any head-to-head trials, what the stack check flags, and sources.
Weight loss
Semaglutide vs tirzepatide
Two approved weekly injections. Tirzepatide also acts on GIP, and it won the one head-to-head weight trial.
Read the comparisonTirzepatide vs retatrutide
An approved dual agonist vs an investigational triple agonist. Their head-to-head trial hasn’t reported yet.
Read the comparisonSemaglutide vs retatrutide
One receptor vs three. Retatrutide’s trials show larger losses, but it isn’t approved yet.
Read the comparisonLiraglutide vs semaglutide
A daily and a weekly GLP-1 from the same maker. Semaglutide more than doubled liraglutide’s weight loss head to head.
Read the comparisonOrforglipron vs semaglutide
A GLP-1 pill that isn’t a peptide vs semaglutide’s weekly shot and its fasting-rule tablets.
Read the comparisonAOD9604 vs HGH fragment 176-191
One amino acid apart and often mixed up. Only AOD9604 was tested in people, and it didn’t beat placebo.
Read the comparisonHealing and repair
BPC-157 vs TB-500
The classic healing pair. BPC-157 has a few small human reports; TB-500 has none.
Read the comparisonBPC-157 vs GHK-Cu
A repair peptide vs a copper skin peptide. GHK-Cu has small skin-cream trials; neither is tested as an injection.
Read the comparisonTB-500 vs thymosin beta-4
A 7-amino-acid fragment vs the 43-amino-acid protein it comes from. Only the protein was tested in people.
Read the comparisonGHK-Cu vs GLOW vs KLOW
One copper peptide vs two blends built on it. Neither blend has been studied.
Read the comparisonGrowth hormone
Sermorelin vs tesamorelin
Two GHRH analogs. Tesamorelin is approved with large trials; sermorelin was approved for children until 2008.
Read the comparisonCJC-1295 vs sermorelin
The same 29-amino-acid base, four swaps apart. Sermorelin was approved; CJC-1295 without DAC has no human trials.
Read the comparisonIpamorelin vs tesamorelin
A ghrelin-receptor peptide vs an approved GHRH analog. Often premixed; never tested together.
Read the comparisonIpamorelin vs sermorelin
Two short-acting growth hormone releasers on different receptors. Only sermorelin was ever approved.
Read the comparisonCJC-1295 vs ipamorelin
The usual growth hormone pairing: two receptors, sold premixed, never tested together.
Read the comparisonCJC-1295 with vs without DAC
The same analog on a different clock: about a week with DAC, short-acting without it.
Read the comparisonMK-677 vs ipamorelin
Both hit the ghrelin receptor: a daily pill with years of data vs a short-acting injection.
Read the comparisonFocus, tanning, sexual health and energy
Selank vs Semax
Two Russian nasal peptides: Selank for calm, Semax for focus. Small studies, mostly in Russian.
Read the comparisonMelanotan 1 vs Melanotan 2
An approved pigment drug vs an unapproved tanning peptide with sexual side effects.
Read the comparisonPT-141 vs Melanotan 2
One end group apart. PT-141 is approved as Vyleesi; Melanotan 2 never was.
Read the comparisonMOTS-c vs NAD+
A mitochondrial peptide vs a coenzyme. Both sold for energy; neither has outcome trials as an injection.
Read the comparison