Comparisons
The pairs people most often confuse, stack together, or buy as though they were interchangeable. Each page puts the two side by side on evidence strength first, because that is usually where they differ most, and it is the comparison nobody selling them makes.

BPC-157 vs Thymosin-β4
The two halves of the most common recovery stack

CJC-1295 (with DAC) vs CJC-1295 without DAC
Same peptide, one linker, completely different behaviour

Semaglutide vs Tirzepatide
The head-to-head has actually been run

Ipamorelin vs GHRP-2
Both hit the same receptor, and selectivity is the whole difference

GHK-Cu vs GHK
Copper is the difference, and it matters

Semax vs Selank
Same Russian lab, two different jobs

Epitalon vs Endoluten (A-8 Pineal)
The synthetic sequence versus the natural extract

BPC-157 vs KPV
Two different routes to the same gut problem

Tesamorelin vs MK-677
An approved injection against an unapproved capsule

Retatrutide vs Tirzepatide
Two receptors against three

Thymosin-α1 vs Thymogen
Two approved-abroad immune peptides, very different scale

MOTS-c vs 5-Amino-1MQ
Both metabolic, both missing the same thing
Compare anything else
These are the pairs that earn a page of their own. The library's compare tool will put any two of the 114 entries side by side on the same rows.
Educational information only. Nothing here is medical advice or a recommendation to use any compound. How to read these entries.