Peptide basics

791,282 people have been enrolled in trials of the peptides tracked here

This page reports how many people have been enrolled in registered trials of the compounds tracked here. Enrolment is a measure of how much has been studied, not of whether anything worked. No dose, schedule or route appears on this page.

What the number counts

Every registered study carries an enrolment figure: how many people took part. Summing that field across every trial we verified as actually administering one of the 68 tracked compounds gives 791,282.¹

The word administering is doing the work. A trial where people are given a compound tells you something about what happens when people are given it. A study where researchers watch a population and record what they were already taking tells you something else entirely, and mixing the two produces a number that means nothing.⁴

The distribution is the story

A single trial can dominate. SELECT enrolled 17,604 adults on its own — more than most compounds on this site have accumulated across their entire registered history. STEP 1, the trial behind most semaglutide weight-loss claims, enrolled 1,961.²³

At the other end, 25 of the 68 compounds contribute exactly zero, because no registered trial has ever administered them to a human being. They are not under-studied. They are unstudied, in the specific sense that the public registry holds nothing.¹

Why a class total is a bad argument

Sellers of unstudied compounds sometimes borrow the credibility of studied ones by talking about peptides as a category: hundreds of thousands of people studied, decades of research, an established field. All of that can be true of the category and none of it true of the thing being sold.¹

The useful figure is never the class total. It is the enrolment behind the specific compound, and for 25 of the 68 here that figure is zero however impressive the class looks.¹

Common questions