Back to Peptides
Skin & JointLow Risk

TB4-Frag

Also known as: Thymosin Beta-4 Fragment, TB4 500-509, LKKTETQ

Half-life:
Unknown

Administration Routes

subcutaneous injectiontopical
PeptideBase provides educational research tools and provider discovery. It does not provide medical advice, diagnosis, treatment, prescribing guidance, or dosing instructions. Consult a qualified healthcare professional before making health decisions.

Mechanism of Action

Active fragment of Thymosin Beta-4; promotes actin dynamics and cell migration; activates hair follicle stem cells; modulates inflammatory signaling

The active fragment of TB-500 (Thymosin Beta-4) specifically studied for hair regrowth and wound healing. Promotes follicle activation and skin repair.

Primary Research Areas

  • hair growth
  • wound healing
  • anti-inflammatory
  • tissue repair

Risk Profile

Low Risk

Generally considered lower risk in research contexts. Consult a healthcare professional before use.

Regulatory Status

Research OnlyNot Evaluated by FDA

N-terminal TB-4 fragment (Ac-SDKP tetrapeptide). Distinct from full-length TB-500/Thymosin Beta-4 (Category 2). No separate FDA action on this fragment. Anti-fibrotic research use only.

Regulatory status reflects publicly available information and may change. This is not legal or medical advice.

Where to Find TB4-Frag