The Longevity Desk

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Everything published so far, newest first. Each piece carries its sources and says where the evidence stops.

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14 minCognitive

P-21 Is Not a Cerebrolysin Derivative, and Every Study I Found Is Rodent

Every number I could find attached to this compound came out of a mouse or a rat, fed in chow, put down a tube into the stomach, leaked from a pellet under the skin, or injected into the abdomen. I found no study, in any species, of the injection under the skin people buy.

13 minCognitive

PE-22-28: The Antidepressant Claim Is Ten Mice in a Water Cylinder

One laboratory in every paper I found, male mice only, injected into the abdominal cavity. The 23 hour duration figure was measured on a different molecule, and the same group later reported the effect reverses direction with dose.

13 minMetabolicInsulin resistance

L-Carnitine Injectable: The Route With the Muscle Evidence Is the One You Swallow

Five hours of infusion, at roughly ten times the blood carnitine the label calls normal, moved muscle carnitine by nothing unless insulin was also pinned high by a second drip. The only protocol I found that raised it outside that laboratory setup was 24 weeks of capsules taken with 160 grams of sugar a day.

11 minMetabolicInsulin resistance

AOD-9604: The One That Got Its Phase 2b, and Missed

502 adults, 24 weeks, three doses against placebo, no separation on the primary endpoint. It is hGH 177-191 with a tyrosine on the front, one oxygen away from the fragment sold as 176-191, and neither of those records is this one's.

11 minMetabolicInsulin resistance

Mazdutide Is Approved in China, and Nowhere Else I Could Find

The first GLP-1 and glucagon dual agonist approved anywhere. It is neither retatrutide nor tirzepatide, and the weight loss figure vendors quote came from a press release rather than the journal.

11 minMetabolicInsulin resistance

Tesofensine: A Pill With a Heart Rate Problem and No Approval I Could Find

It came out of a Parkinson and Alzheimer programme that produced no drug, then took 10.6 percent off body weight in 24 weeks. The phase 3 that should have followed was never run, and the Mexican approval you will see quoted is contradicted by the sponsor's own releases.

11 minRecoveryInflammation

GHK-Cu: Every Human Study Is a Cream, and It Is Sold in a Vial

The copper peptide has a credible human research record. All of it was rubbed on skin, two of the three controlled trials found nothing, and I could not find a published study injecting it into a person.

11 minMetabolicMitochondria

NAD+: The Molecule in the Bag Never Gets Inside a Cell

Enzymes on the outside of the cell take NAD+ apart before anything crosses the membrane, and only the fragments go in. Which leaves the drip as a delivery system for precursors, sold on evidence generated by swallowing precursors.

11 minCognitive

Selank: Three Russian Trials, and Not One of Them Says How Much

The whole human record is three papers from the institutes that created the compound, tested against a sedative rather than a fake treatment, and not one reports a dose. The Semax it is sold alongside has never been given with it in any study.

9 minSourcing

Buying Peptides Without Getting Ripped Off

When independent labs tested what was actually in the vials, the answer was not slightly weak. In one set, there was no peptide in the vial at all.

11 minMetabolicInsulin resistance

GLP-1s for Weight Loss: What You Are Actually Buying

This is the one category on this site where the drugs demonstrably work and the trials are enormous. Which is exactly why the risk has moved off the molecule and into the vial.

11 minMetabolicInsulin resistance

Tirzepatide: The Trials Are Real, Which Is Why Somebody Copied One

An approved drug with placebo controlled phase 3 evidence in tens of thousands of people, and a ClinicalTrials.gov record that reproduces the biggest of those trials character for character, down to Eli Lilly's internal protocol code.

11 minMetabolicInsulin resistance

Semaglutide: The Evidence Is Not the Problem

One of the most studied drugs of the past decade. The real questions are what is in the vial you bought, and whether you are allowed to have it.

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