PeptideSearch

Chrysalin

Tested in people

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It has been tested in people, but it is not an approved medicine. The studies are usually small.

Compiled and reviewed by the PeptideSearch Editorial Team · Status checked 2026-08-04

Also called TP-508 / Rusalatide acetate

A short peptide copied from thrombin, tested in people for bone and wound healing.

The basics

What is it?
Chrysalin is a 23-amino-acid piece of thrombin, a blood clotting protein. It has been through human trials for fracture repair and diabetic foot ulcers.

Official status: Not nominated for 503A compounding · Checked 2026-08-04

Can a doctor prescribe this?

Small pharmacy (503A)
Never put forward to FDA
Large outsourcing facility (503B)
Never put forward to FDA

Not FDA approved and not on the U.S. compounding list. A doctor cannot prescribe it.

503A is a pharmacy making a single prescription for one patient. 503B is a facility making batches. They are governed by separate lists. Where a category is shown, it is a position on the FDA's list of substances that have been put forward and are still being worked through — not the final list, which is set by rulemaking. Category 1 means the FDA does not plan to act against a pharmacy that makes it while the review runs.

Lab suppliers we list: 2

Doses used in research

Taken word for word from the studies and trials listed on this page. This is not a recommendation and not a dose for anyone to take.

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