Half-Life.

The science of optimization.

Issue 01 · Mechanism-first

Sourced, skeptical, mechanism-first coverage of the peptide era.

We read the primary literature so the meme doesn't get ahead of the mechanism.

Lead story

Profiles·9 min read·June 10, 2026

Shaquille O'Neal's GLP-1 — for sleep apnea, not a weight story

A 2011 Harvard sleep study, a Zepbound prescription, and an Eli Lilly campaign disclosure.

Read the piece

Profiles

Public-figure reportage

Sourced accounts of public figures who have publicly discussed GLP-1 medications — FDA-approved prescription drugs, not research peptides.

The feed

16 pieces

Education·13 min read

How to read a peptide Certificate of Analysis

A field guide to the document every research-peptide seller publishes and almost no reader interrogates. Batch numbers, HPLC, mass spec, and the difference between a real third-party report and a decorative PDF.

Education·9 min read

What 'research use only' actually means

Four words that started life describing bench reagents and now travel on the outside of consumer-facing peptide vials. The legal weight is smaller than the label implies.

Education·10 min read

Why third-party purity testing matters

Counterfeits, contaminants, and the reason 'looks like the label' is not evidence of anything.

Education·11 min read

BPC-157: what the research has actually examined

The rodent literature is large and specific. The clinical literature is small and inconclusive. Both facts are worth reading carefully.

Education·10 min read

TB-500: what the research has actually examined

A synthetic fragment of thymosin beta-4 with a preclinical footprint in tissue repair models, an equine racing regulatory history, and almost no controlled human data.

Education·10 min read

GHK-Cu: what the research has actually examined

A copper-binding tripeptide with a long biochemistry, a substantial cosmetic-ingredient literature, and a much smaller injectable clinical footprint.

Education·11 min read

CJC-1295 and Ipamorelin: what the research has examined

A GHRH analog and a selective ghrelin-mimetic. The short-term pharmacodynamic story is well characterized; the chronic clinical story for the marketed use case is not.

Pharmacology·13 min read

GLP-1 compounds in longevity and performance circles: trial data versus the hype

The peer-reviewed program for semaglutide and tirzepatide is one of the largest in modern pharmacology. The way it gets discussed in longevity and biohacking media is a different document.

Reference·10 min read

The peptide reclassification, explained

The February 2026 regulatory changes in plain language: what shifted, what did not, and which categories of buyer and seller the changes actually reach.

Trends·13 min read

The GLP-1 moment reaches sport

What started as a diabetes and obesity story is now turning up in locker rooms, broadcast booths, and anti-doping monitoring lists.

Education·9 min read

What peptides actually are

Short chains of amino acids. Everything else — the marketing, the categories, the legality — sits on top of that one sentence.

Education·12 min read

BPC-157: striking animal data, almost no human data

The preclinical literature is large. The clinical literature, as of early 2026, is essentially absent — and regulators have noticed.

Education·11 min read

Sleep, recovery, and the secretagogue story

Growth hormone pulses during deep sleep. That fact gets stretched a long way in marketing copy for peptides that target the same axis.

Education·9 min read

'Research use only,' explained

Four words that do a lot of regulatory and legal work — and that mean less than the label implies.

Education·10 min read

Why third-party testing matters

Identity, potency, sterility, endotoxin. The four words you should know before reading a Certificate of Analysis.

Education·11 min read

What 'compounded' actually means

The word covers a regulated pharmacy practice, an emergency shortage workaround, and — in 2025 — an FDA enforcement target. They are not the same thing.

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