A to Z / Cosmetic / skin
Zinc Thymulin
Also known as zinc-bound thymulin, topical thymulin.
Best known for The hair-loss peptide with one small human pilot
Evidence★★☆☆☆
Safety dataPoorly characterised
Route Topical (scalp)
United StatesNot approved
AustraliaNot listed by name; unapproved therapeutic good
as at 16 September 2026
What it is and what it does
Zinc Thymulin is the thymic peptide thymulin bound to zinc, formulated as a topical scalp preparation for hair loss. It has been tested in one small human pilot study, and it is not approved.
What the full entry covers
The book carries the rest of this entry:
- Where the research stands, with every claim cited
- What people commonly ask, and what the research shows so far
- Dosing in four labelled bands, described and not recommended
- Side effects, serious risks, cautions and interactions
- Questions to discuss with your doctor
- How it compares with Thymulin, AHK-Cu, Copper Peptide Hair Complex, GHK-Cu
Related entries
A certificate of analysis tells you what is in a vial. The evidence rating above tells you whether the compound has been shown to work in humans. Neither answers the other's question. How to read a certificate of analysis.
This page describes what is known and not known about Zinc Thymulin. It is not medical advice and not a recommendation to use it.