TB-500 (Thymosin Beta-4) is a systemic healing peptide that promotes connective tissue regeneration, reduces scar tissue, and restores flexibility throughout the entire body. Prescribed online by licensed U.S. providers. Starting at see pricingnth.
Start Your TB-500 Protocol →TB-500 is a synthetic analog of Thymosin Beta-4 (Tβ4), a naturally occurring peptide found in virtually every cell of the human body. First isolated from thymus tissue, Thymosin Beta-4 plays a critical role in actin polymerization — the cellular process essential for cell migration, tissue repair, and wound healing. As a systemic healing agent, TB-500 exerts its effects throughout the entire body rather than at a single injury site, making it uniquely powerful for athletes and patients with widespread tissue damage or chronic degeneration.
TB-500's primary mechanism involves upregulating actin, a protein responsible for cellular movement and structural integrity. By promoting actin binding and polymerization, TB-500 accelerates the migration of healing cells (including stem cells and keratinocytes) to sites of injury, dramatically speeding the repair of muscles, tendons, ligaments, fascia, and even cardiac tissue. It also reduces pro-inflammatory cytokines and promotes new blood vessel formation in damaged areas.
At PeptidesRx, TB-500 is most often prescribed as part of the BPC-157 + TB-500 healing stack — the most comprehensive joint and tissue recovery protocol available through telehealth. The two peptides work through complementary mechanisms, with TB-500 providing the systemic connective tissue foundation while BPC-157 addresses local repair and gut healing.
Upregulates actin binding proteins, enabling faster cellular migration to injury sites — the fundamental mechanism driving TB-500's whole-body healing effect.
Promotes regeneration of tendons, ligaments, fascia, and extracellular matrix — the structural components that are notoriously difficult to heal and prone to chronic injury.
Modulates the inflammatory response to reduce excessive scar formation, promoting regenerative repair rather than fibrotic healing that limits range of motion.
Stimulates new blood vessel formation in injured tissues, improving oxygen and nutrient delivery to areas that would otherwise heal slowly due to poor vascularization.
TB-500 provides systemic connective tissue regeneration, making it ideal for athletes, post-surgical patients, and anyone with chronic musculoskeletal issues.
TB-500 is ideal for individuals dealing with multiple areas of injury or chronic degeneration, or for anyone who wants a systemic healing approach rather than targeting a single site. Athletes who train hard across multiple muscle groups, individuals recovering from major surgeries, or patients with widespread connective tissue issues (fasciitis, widespread tendinopathy, hypermobility disorders) are excellent candidates.
Because TB-500 acts systemically rather than locally, it is particularly powerful for individuals where the source of dysfunction is diffuse — for example, a triathlete with hip, knee, and shoulder issues simultaneously, or a patient with chronic back pain involving multiple ligamentous and muscular structures. TB-500 is also beneficial for those who have experienced significant scar tissue buildup from prior injuries or surgeries that is limiting their range of motion and mobility.
TB-500 is almost always recommended in combination with BPC-157. While BPC-157 handles localized repair and gut health, TB-500 provides the systemic connective tissue foundation. Together, they address tissue healing comprehensively at both the local and whole-body level. Our Full Protocol tier includes both peptides at optimal dosing.
TB-500 uses a loading and maintenance protocol. It can be injected anywhere subcutaneously due to its systemic distribution throughout the body.
| Phase | Dose | Frequency |
|---|---|---|
| Loading (Weeks 1–4) | 2 mg | SubQ injection 2x/week |
| Maintenance (Weeks 5+) | 2 mg | SubQ injection 1x/week |
| Stack with BPC-157 | TB: 2mg 2x/week + BPC: 500mcg daily | Concurrent — recommended combo |
* TB-500 can be injected subcutaneously anywhere on the body — systemic distribution means injection site does not need to be near the injury. All protocols are set by your licensed provider.
Inflammation starts to reduce throughout the body. Many patients notice improved overall mobility and less morning stiffness as the systemic anti-inflammatory effect takes hold.
Range of motion increases noticeably as connective tissue begins to remodel. Scar tissue becomes more pliable. Athletes report being able to move through full range without restriction.
Significant connective tissue regeneration occurs. Tendons, ligaments, and fascia rebuild with improved structural integrity. Recovery between training sessions accelerates dramatically.
Comprehensive healing of connective tissues throughout the body. Maintenance dosing begins. Many patients cycle TB-500 seasonally to maintain peak connective tissue health.
No hidden fees. No insurance required. Provider consultation, prescription, and medication are all included.