TB-500

Synthetic thymosin beta-4 peptide for tissue repair and cell migration.

Thymosin Beta-4TB4Tβ4

TB-500 is a synthetic version of Thymosin Beta-4, a naturally occurring 43-amino acid peptide found in virtually all human and animal cells. It plays a critical role in tissue repair, cell migration, and wound healing. TB-500 upregulates actin, a cell-building protein essential for healing and forming new blood vessels.

Key Benefits

Wound Healing

Research shows accelerated wound closure, reduced scarring, and improved tissue regeneration in skin injuries.

Cardiac Repair

Studies demonstrate cardioprotective effects and improved recovery after heart damage through activation of cardiac progenitor cells.

Reduced Inflammation

TB-500 downregulates inflammatory cytokines and promotes anti-inflammatory responses at injury sites.

Muscle Flexibility

Promotes muscle fiber relaxation and may help prevent injuries by improving tissue flexibility and blood flow.

Hair Regrowth

Research in animal models shows stimulation of hair follicle stem cells and promotion of new hair growth.

Joint Recovery

May promote healing in joint tissues, including cartilage and synovial membranes, through enhanced cell migration.

Research Dosing Information

Common Dose

2-5 mg per week (loading), 2 mg per week (maintenance)

Route

Subcutaneous or intramuscular injection

Frequency

2-3 times per week during loading, 1-2 times for maintenance

Cycle Length

4-6 weeks loading, then maintenance as needed

Not FDA-approved. Loading phase with higher doses is common in research protocols, followed by a reduced maintenance dose. Systemic administration works due to TB-500's ability to travel through the body.

Research Summary

Thymosin Beta-4, the parent compound of TB-500, has been studied since the 1960s. Research demonstrates potent wound healing, cardiac repair, and anti-inflammatory properties. Notable studies include phase II clinical trials for corneal wound healing (RegeneRx) and cardiac repair after myocardial infarction. The peptide's mechanism involves upregulation of actin, promotion of cell migration, and modulation of inflammatory pathways.

Safety Considerations

Not FDA-approved for therapeutic use.
Generally well-tolerated in clinical trials for ophthalmic use.
Headache and temporary irritation at injection site are the most commonly reported side effects.
Theoretical concern about tumor angiogenesis — avoid if you have active cancer.
Quality control varies widely among commercial sources.

Frequently Asked Questions

What is the difference between TB-500 and Thymosin Beta-4?

TB-500 is a synthetic fragment designed to mimic the active region of the full Thymosin Beta-4 protein. They share the same healing mechanisms but TB-500 is more commonly available as a research peptide.

Can TB-500 and BPC-157 be used together?

Many research protocols combine these peptides. They work through different mechanisms — BPC-157 focuses on angiogenesis and NO pathways while TB-500 upregulates actin for cell migration. Combining may offer synergistic healing.

How quickly does TB-500 work?

In animal research, improvements in healing markers are typically observed within 1-2 weeks. Full tissue remodeling may take 4-8 weeks depending on injury severity.