compare the pens.
Honest, side-by-side breakdowns, receptors, published evidence, side-effect profiles and what to pair each compound with.
class & compound guides
Informational comparisons for the compounds we supply as blends, or against a reference compound — how the mechanisms differ, and why some are studied together rather than chosen between.
Tirzepatide vs Semaglutide
This is the cleanest way to understand the incretin classes: semaglutide is a single-receptor agonist, tirzepatide is a dual-receptor agonist. The comparison is about how many incretin receptors each engages — and where the research record sits. Veyvora supplies tirzepatide (and the triple agonist retatrutide); we do not stock semaglutide.
read the comparisonCJC-1295 vs Ipamorelin
These two are not really rivals — they're studied together because they act through different receptors on the growth-hormone axis. Understanding the difference is the point: CJC-1295 is a GHRH analogue, Ipamorelin is a selective GH-releasing peptide.
read the comparisonBPC-157 vs TB-500
The two most-studied tissue-repair peptides are frequently framed as alternatives, but in the research they map to different pathways — which is exactly why they're so often combined rather than chosen between.
read the comparisonGHK-Cu vs GLOW vs KLOW
All three sit in the copper-peptide corner of the aesthetics range, and the difference is simple once you see it: GHK-Cu is the single copper tripeptide, while GLOW and KLOW are multi-peptide blends built around that same copper-peptide theme.
read the comparisonMOTS-c vs SS-31
Both are mitochondrial peptides, and both sit in the same research pen — but they approach the mitochondrion from opposite directions. One comes from it, the other targets it. That's the whole distinction.
read the comparisonPT-141 vs Melanotan II
These two are close relatives — both melanocortin-receptor agonists — and the comparison comes down to a single question: which receptors each one favours. That selectivity is what places them in different parts of the range.
read the comparison
