The Saturday Dispatch · No. 02

Retatrutide is finally on three indexes. Should you care yet?

On the difference between availability and good research. Plus a letter from a reader about gut peptides at midlife.

Good morning. Retatrutide showed up on three of the indexes we track this week, which means the question in our inbox shifted overnight from "where can I find it" to "should I." Those are very different questions, and the gap between them is the whole point of this issue.

Availability is not evidence

A compound appearing on more vendor catalogs tells you about supply, not about safety or efficacy. Retatrutide has genuinely interesting trial data behind it — but "interesting trial data" and "well-understood in the way semaglutide now is" are years apart.

The market always moves faster than the evidence. Your job as a reader is to notice when it does.

When a compound gets easier to buy, the temptation is to read that as a green light. It isn't. It's a supply signal. The research timeline hasn't moved just because three more vendors decided to stock it.

What we'd actually watch

  • Whether the per-mg pricing stabilizes or stays volatile (volatile = thin, early supply)
  • Whether COA documentation shows up consistently across vendors
  • What the next peer-reviewed readouts say, not what the forums say

A reader letter

A reader in her early fifties wrote in about gut-targeted peptides and perimenopause, and asked a sharp question we didn't have a clean answer to. We're going to take that one to a longer piece rather than answer it badly in a sentence. More soon.

Until next Saturday.

Research use only. Peptide Price Lab is an editorial calculator. Nothing here is medical advice, a recommendation, or a prescription. Consult a qualified clinician before anything that meets your body.