Thymosin beta4 increases hair growth by activation of hair follicle stem cells.
Philp D, Nguyen M, Scheremeta B et al. · FASEB journal : official publication of the Federation of American Societies for Experimental Biology · PMID 14657002
Study summary
Main finding
Thymosin beta4 increased hair growth in rodents and promoted migration and differentiation of follicular cells.
Rat and mouse hair models and follicular keratinocytes
How the study was set up
Normal rats and mice and isolated rat whisker-follicle cells were used to study full-length thymosin beta4 during hair growth.
What the researchers measured
Hair growth, follicle-cell migration and differentiation, peptide expression during the growth cycle, and matrix-remodeling enzyme activity were assessed.
How to read this evidence
Researchers studied cells, isolated tissue, or animals. These experiments can help explain a mechanism, but do not establish benefits or safety in people. Human cells grown in a laboratory also belong in this category.
Results in context
The work connects follicle biology with rodent hair growth. It does not measure human scalp-hair outcomes or test a TB-500 hair product.
What this does not establish
Rodent hair growth and isolated cells are not human hair-loss trials; the paper studies thymosin beta4, not a verified TB-500 formulation.
This collection includes related thymosin beta4 research. Parent or engineered peptide findings do not establish that a TB-500 fragment or a product sold under that name has the same effects.
Publication & source
Why this paper is included
The title focuses on thymosin beta4 or TB-500; parent-peptide findings do not establish TB-500 fragment effects.