What is BPC-157 / TB4 Blend?
A peptide blend combines more than one peptide together to produce additive, and sometimes synergistic, effects.
The BPC-157/TB4 blend is an investigational research blend that combines the wound healing, tissue repair, and anti-inflammatory properties of both peptides to provide a more robust overall effect.
What are BPC-157 and TB4?
BPC-157 is a peptide that influences multiple biological pathways involved in healing and tissue repair. It interacts with the body’s nitric oxide system to help regulate blood flow and inflammation, supports the formation of new blood vessels (angiogenesis), and promotes cellular migration to help cells move to injured areas and rebuild damaged structures. It has also shown potential in protecting nerves and supporting nerve regeneration in animal models.
Thymosin beta 4 (TB4) is a naturally occurring peptide found in nearly every cell in the human body, encoded by a gene on the X chromosome. Its primary role is to bind to actin, a key microfilament in the cytoskeleton, helping reorganize the cell’s structural framework and influence how cells move. Research has shown that TB4 plays an important role in tissue repair, helping cells migrate to the site of injury so they can rebuild and heal damaged tissue.
Because BPC-157 and TB4 work in different ways to produce similar results, their combination is thought to be at least additive, and potentially synergistic.
What is BPC-157/TB4 Blend Used For?
- Investigational use for aiding in wound healing and tissue repair, especially muscles, tendons, ligaments
- Reducing inflammation
- Joint support: By supporting connective tissue repair, this combination may play a role in joint recovery following injury.
- Nerve protection: Experimental models suggest potential benefits in nerve healing and protection after trauma.
Side Effects of BPC-157/TB4 Blend
Limited data shows that BPC-157 and TB4 individually are well-tolerated with minimal side effects. Most of the side effects have been due to the injection rather than the peptides. Please see the pages for BPC-157 and TB4 for more details.
BPC-157/TB4 Blend Dosing Protocol (for Research)
Investigational formulations of BPC-157 and TB4 usually contain both peptides in an equal 1:1 ratio (for example, 10 mg of each). Below is a suggested protocol for research use (subcutaneous injection).
| Phase | Dose & frequency |
|---|---|
| Week 1 | 0.5 mg of each daily (1 mg total) |
| Weeks 2 and beyond | 1 mg of each daily (2 mg total) |
Shown for education. A licensed clinician should set any actual dose. Compare protocols across peptides in the peptide dosage chart.
Common questions about BPC-157 / TB4 blend
What is BPC-157 / TB4 blend?
A peptide blend combines more than one peptide together to produce additive, and sometimes synergistic, effects. The BPC-157/TB4 blend is an investigational research blend that combines the wound healing, tissue repair, and anti-inflammatory properties of both peptides to provide a more robust overall effect.
What is BPC-157 / TB4 blend used for?
Areas studied include: Investigational use for aiding in wound healing and tissue repair, especially muscles, tendons, ligaments; Reducing inflammation; Joint support; Nerve protection.
What are the side effects of BPC-157 / TB4 blend?
Limited data shows that BPC-157 and TB4 individually are well-tolerated with minimal side effects. Most of the side effects have been due to the injection rather than the peptides.
What is the dosage of BPC-157 / TB4 blend?
One commonly referenced research protocol is: Week 1: 0.5 mg of each daily (1 mg total); Weeks 2 and beyond: 1 mg of each daily (2 mg total). Shown for education only; a licensed clinician should set any actual dose. See the dosing table.
How do you mix (reconstitute) BPC-157 / TB4 blend?
Wipe the vial tops with alcohol, add bacteriostatic water slowly so it runs down the inside of the glass, then roll the vial gently until the powder dissolves; don’t shake it. See the step-by-step guide with diagrams for the pen and syringe methods.
How much bacteriostatic water do you add to BPC-157 / TB4 blend?
There is no single correct amount. We recommend 2.1 mL: about 0.1 mL is lost during transfer, leaving roughly 2.0 mL of usable solution. You can add more or less (most peptide vials hold up to 3 mL); just enter the amount in the dose calculator. See the step-by-step mixing guide.
Is BPC-157 / TB4 blend FDA-approved?
No. BPC-157 / TB4 blend is not FDA-approved in the US (status as of October 2026).
References
- Sikiric P, et al. Stable gastric pentadecapeptide BPC-157: novel therapy in gastrointestinal and extra-intestinal healing. Curr Pharm Des. 2011;17(16):1612–1632. View source
- Seiwerth S, et al. BPC 157 and blood vessels. Curr Pharm Des. 2014;20(7):1121-5. doi: 10.2174/13816128113199990421. PMID: 23782145. View source
- Xue B, et al. Structural basis of thymosin-β4/profilin exchange leading to actin filament polymerization. Proc Natl Acad Sci U S A. 2014 Oct 28;111(43):E4596-605. View source
- Sosne G, et al. 0.1% RGN-259 (Thymosin ß4) Ophthalmic Solution Promotes Healing and Improves Comfort in Neurotrophic Keratopathy Patients in a Randomized, Placebo-Controlled, Double-Masked Phase III Clinical Trial. Int J Mol Sci. 2022 Dec 29;24(1):554. View source
- Wang X, et al. A first-in-human, randomized, double-blind, single- and multiple-dose, phase I study of recombinant human thymosin β4 in healthy Chinese volunteers. J Cell Mol Med. 2021 Sep;25(17):8222-8228. View source