TB-4 Topical (Hair) (Thymosin Beta-4 Topical (Hair Growth))
Thymosin Beta-4 applied topically or via mesotherapy for hair follicle stem cell activation. TB-4 promotes migration of hair follicle stem cells from the bulge region into the follicular matrix, potentially reactivating dormant follicles.
How it works
Promotes migration and differentiation of hair follicle stem cells via actin sequestration and cell motility enhancement. Activates quiescent stem cells in the bulge niche. Stimulates new blood vessel formation around follicles for nutrient delivery.
Key facts
- Molecular weight: 4921 Da
- Half-life: ~6 hours (systemic); local depot effect (topical)
- Bioavailability: Topical: penetrates to bulge region with microneedling
- Storage: Lyophilized: -20°C. Reconstituted serum: 2-8°C, use within 2 weeks.
Dosing overview
- Typical dose: 50-200 mcg per scalp application or 0.1% solution
- Frequency: 3x weekly
- Duration: 3-6 months
- Route: Topical serum or mesotherapy (intradermal injection)
Reported benefits
- Hair follicle stem cell activation
- Dormant follicle reactivation
- Scalp angiogenesis
- Anti-inflammatory for scalp
- Synergistic with microneedling
- Novel mechanism (stem cell migration)
Possible side effects
- Injection site discomfort (mesotherapy)
- Mild scalp redness
- Temporary shedding possible
- Limited human data
Research
- Thymosin beta-4 and hair follicle stem cells (2021): TB-4 activated quiescent stem cells in the hair follicle bulge, promoting differentiation into follicular matrix cells and new hair shaft formation in murine models.
- TB-4 mesotherapy for alopecia (2022): Intradermal TB-4 (100mcg biweekly) plus microneedling increased hair density by 22% over 24 weeks in treatment-resistant AGA.
Compare TB-4 Topical (Hair)
Research and educational reference only. Not medical advice.