Notebook entry A

Start here: what “peptide” tells you

The word tells you what a substance is built from. It stays silent on approval, on who made the product, and on who is answerable when something goes wrong.

Rules checked: September 2026.

Flat illustration of three labeled specimen cards with leaves and molecule-like dots

A useful word, used too loosely

Think of a peptide as a small string of amino acids, the pieces proteins are assembled from.

The word can cover an everyday prescription, a custom-made medicine, or a chemical offered with no approved medical use. Treat it as the start of a question, not the answer.

Names you may already know

Two familiar ones hold full FDA approval: semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound). Even so, each brand and each form, injection or tablet, has its own approved uses.

As of September 2026, other products sold as peptides, including BPC-157 and ipamorelin, are not approved medicines in the United States: FDA’s approval records show no application for them at all.

So there is no FDA-approved version of them for a doctor to prescribe.

That is a statement about approval, not a test result about safety.

The point to keep

Margin note

Ask which kind of product it is

A useful answer sounds like “this is FDA-approved Wegovy”, “this is a medicine made to order by a named pharmacy”, or “this is sold for research only”.

“Peptide therapy” alone does not answer the question.