PeptideSearch

Thymogen

Very early research

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The research is at the earliest stage – mostly cells in a lab dish. It is far too early to say much.

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

Also called Glutamyl-Tryptophan / Thymogen alpha-1 / Timogen

A two-piece peptide studied in Russia for immune support. Almost no Western research.

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 approved in the US and not on the compounding list.

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: 1

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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