Updated quarterlyEvidence-graded
ThePeptideCompanion
The evidence-graded reference to read before you start, and to come back to as things change.
39 compounds · Evidence grades A to E · Updated quarterly
Written by someone who isn’t selling you anything. No vendors, no sponsors, no promises.
39 compounds·9 categories
Why this book exists
Most of what you can read about peptides is written by someone who sells them. The Peptide Companion isn’t. It grades the evidence for 39 compounds across 9 categories, explains what FDA actually did in 2026 (and what it did not do), and shows you how to read the documents sellers publish, so you can tell a measurement from a marketing claim.
What is inside
- An A-to-E evidence grade for every compound, with the reasoning behind each grade.
- The two questions people mix up: whether something is approved, and whether it can be compounded.
- A plain account of the 2026 regulatory record, and the myths that grew out of it.
- How to read a certificate of analysis: eight checks, in order.
- The red flags that matter, and what red flags cannot tell you.
- The questions to ask a prescriber, a pharmacy or a seller before you pay.
- 39 compound monographs, each with its grade, regulatory status, what has and has not been studied, and known risks.
- Side effects, monitoring, stop criteria, and what to do if something goes wrong.
- Tools: the Compound Quick-Reference Matrix and five worksheets.