Peptide comparisons

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Semaglutide vs Tirzepatide

Two of the most extensively studied incretin-based therapies — approved and marketed in the same therapeutic areas, but with different receptor profiles, different phase-3 programs, and different published outcomes. This page compares what the peer-reviewed literature and regulatory documentation currently support for each.

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Tirzepatide vs Retatrutide

Two incretin-based peptides in the same broad family, but at very different stages of development. This page compares what the peer-reviewed literature currently supports on each — regulatory status, receptor targets, evidence tier, and headline efficacy from published phase-3 trials.

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BPC-157 vs TB-500

These two peptides are the most-discussed pair in the tissue-repair conversation, and they are also the most-conflated. In practice they share none of what usually justifies grouping compounds: their origins are unrelated, their mechanisms are unrelated, and the shape of the evidence supporting each is structurally different. This page walks through those distinctions.

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KPV vs GHK-Cu

Two small, endogenously-derived peptides that get grouped in discussions about anti-inflammatory and skin peptides. They share molecular scale — both are tripeptides — and their mechanisms are both proposed to be intracellular rather than classical receptor-mediated. Everything else about their evidence structures, use cases, and regulatory status differs, in ways that are worth reading precisely.

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Tesamorelin vs Sermorelin

Two GHRH analogues built for the same fundamental job — stimulating the pituitary's own pulsatile release of growth hormone — but at very different points in structure, half-life, and regulatory history. This page compares what the peer-reviewed literature and regulatory documentation currently support for each.

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CJC-1295 (No DAC) vs Sermorelin

Two GHRH(1-29)-based signals. Sermorelin is the native sequence; CJC-1295 No DAC is the same sequence with four amino acid substitutions that resist enzymatic degradation. This page compares what the peer-reviewed literature currently supports on each.

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CJC-1295 No DAC vs CJC-1295 DAC

The two forms share an identical GHRH(1-29) backbone with the same four amino acid substitutions. The Drug Affinity Complex (DAC) — a single maleimidopropionic acid linker that covalently binds serum albumin — is the only chemical difference. Every downstream pharmacologic property flows from that one addition. This page reads out those differences precisely.

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AOD-9604 vs Semaglutide

Two compounds pursued as pharmacological approaches to weight loss, from opposite starting points and with opposite clinical results. AOD-9604 was designed as a lipolytic fragment of human growth hormone; its 2007 phase 2b did not meet its primary endpoint and its pharmaceutical program was discontinued. Semaglutide came from the incretin research tradition, obtained FDA approval for chronic weight management in 2021, and produced a large clinical evidence base. This page presents the two side by side to make each visible in the other's context.