No hype, no fear-mongering. A plain-English map of the peptides you keep hearing about.
A peptide is a short chain of amino acids. Your body already makes thousands of them. They act as messengers, telling specific cells to do a specific job: release a hormone, repair tissue, calm inflammation, regulate appetite. The peptides people talk about are engineered versions of those natural signals, built to last longer in the body.
The word "peptide" sounds like fringe biohacking until you realize two of the most established compounds in all of medicine are peptides themselves.
Insulin is a peptide. It is a small chain of amino acids your pancreas releases to tell cells to take up glucose. Millions of people inject it every day, and it has been doing the exact thing every peptide does, carrying a specific signal to specific cells, since it was first isolated in 1921.
Human growth hormone is a peptide too. A longer one, but the same category. It is the actual hormone that the GH-releasing peptides like CJC-1295, ipamorelin, sermorelin, and tesamorelin ask your own body to produce more of. That distinction matters: injecting HGH directly is a different decision, with a different risk profile, than nudging your pituitary to release its own.
Same molecule, very different sourcing. This is the part nobody explains.
Sold by research labs and labeled not for human consumption. This is the gray market. No prescription, lower prices, and quality that lives or dies entirely on the vendor's third-party testing. Buyer beware applies hard here.
A pharmacy that compounds a medication for a specific patient with a specific prescription. This is the legitimate, doctor-in-the-loop route for peptides eligible to be compounded.
A registered facility that compounds at larger scale under tighter FDA oversight, supplying clinics. Generally the most rigorously regulated of the compounding routes.
Which peptides can be legally compounded has been shifting, and some have been moving back toward legal compounding pharmacy access. It changes often. Anything you consider should be confirmed with a current, licensed clinician rather than assumed from a post online.
The one peptide tool that isn't trying to sell you peptides.
Reptides is the independent research wiki I co-founded. Every peptide is graded S–F on published evidence and fully cited, the vendors who sell them are graded the same way, and there is zero affiliate money in the mix. It is the reference I wish existed when I started.
I spent a decade and a lot of money making the mistakes in this space so you would not have to. This is me trying to hand people a straight, cited answer instead of a discount code. A reference, not a sales pitch.
An independent research reference, the same posture as the peptide content on this site. No medical claims and no dosing advice.
Look it up on Reptides, the independent wiki I co-founded. Graded S to F on published evidence and fully cited, or ask the AI that only answers from the research corpus.