The Peptide Digest

One peptide.
One myth.
One rule.
Every month.

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Latest Issue
Issue #16 · March 2026 New
Retatrutide

Retatrutide's big numbers, why "triple receptor" matters, and the muscle-loss myth that won't die

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Archive

All past issues

Issue #15 · February 2026
Peptide of the Month
Bremelanotide

Bremelanotide, the FDA-approved peptide for female desire, and what Vyleesi's commercial story actually looks like

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Issue #14 · January 2026
Peptide of the Month
Melanotan II

Melanotan II, the tanning peptide that rewrote sexual pharmacology, and why grey-market vials are a different animal

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Issue #13 · December 2025
Peptide of the Month
MOTS-c

MOTS-c, the mitochondrial peptide sold as "exercise in a bottle," and what the humans data actually shows

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Issue #12 · November 2025
Peptide of the Month
CJC-1295

CJC-1295, the weekly-injection GH booster, and the Phase II trial that ended in a fatal heart attack

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Issue #11 · October 2025
Peptide of the Month
Ipamorelin

Ipamorelin, the "cleanest" GH booster, and the two Phase II trials that quietly missed their endpoints

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Issue #10 · September 2025
Peptide of the Month
Sermorelin

Sermorelin, the FDA-approved peptide you can't buy, and what that tells you about this market

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Issue #09 · August 2025
Peptide of the Month
Vilon

Vilon, a two-amino-acid "longevity peptide," and why mouse lifespan doesn't equal human lifespan

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Issue #08 · July 2025
Peptide of the Month
DSIP

DSIP, the "sleep peptide" that still can't tell you how it works

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Issue #07 · June 2025
Peptide of the Month
Pinealon

Pinealon, the "bioregulator" tradition, and why Western researchers keep raising an eyebrow

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Issue #06 · May 2025
Peptide of the Month
Semax

Semax, the nootropic pitch versus the stroke-rehab reality, and why the gap matters

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Issue #05 · April 2025
Peptide of the Month
Selank

Selank, the Russian nasal spray pitched as a gentler benzo, and what "gentler" actually means here

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Issue #04 · March 2025
Peptide of the Month
BPC-157

BPC-157, the recovery peptide everyone's heard of, and the missing human trials nobody talks about

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Issue #03 · February 2025
Peptide of the Month
GHK-Cu

GHK-Cu's skincare receipts, the longevity-injection detour, and where the evidence actually ends

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Issue #02 · January 2025
Peptide of the Month
IGF-1 LR3

IGF-1 LR3, the peptide too dangerous for human trials, and why the grey market sells it anyway

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Issue #01 · December 2024
Peptide of the Month
TB-500

TB-500's marketing problem, the thymosin beta-4 name game, and what the human trials actually say

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