In plain English
Thymosin Beta-4 is a natural repair protein found in almost every cell, in especially high amounts in wound fluid and blood platelets. It helps cells move into injured areas, builds new blood vessels and calms inflammation. TB-500 is a short piece of it.
What it's used for
- Wound and soft-tissue healing
- Heart repair after injury (being studied)
- Eye surface healing (being studied)
- Hair growth
Benefits
In human studies, eye drops of Thymosin Beta-4 improved healing in dry eye and corneal injuries, and early wound-healing trials showed faster closure of some ulcers. In animal studies, it protected and repaired heart muscle after heart attacks. Users report faster recovery from soft-tissue injuries.
How it works
In simple terms: Thymosin Beta-4 helps cells move to where repair is needed and grow new blood vessels to feed the healing area.
It binds actin, the protein cells use to change shape and move, which lets repair cells migrate. It also promotes new blood vessel growth, reduces inflammation and scarring, and activates stem cells in heart and other tissues.
Development history
- 1981: Isolated from the thymus by Allan Goldstein’s group.
- 2000s: RegeneRx begins human trials for wounds, eyes and the heart.
- 2010s: Eye-drop form tested in dry eye and corneal healing trials.
Typical protocols
These ranges are what users commonly report.
| Phase | Dose | Frequency | Length |
|---|---|---|---|
| Loading | 2–5 mg | Twice a week | 4–6 weeks |
| Maintenance | 2 mg | Once a week or every 2 weeks | As needed |
Cycling
Loading phase of 4–6 weeks, then lower maintenance or a break.
Administration options
Subcutaneous or intramuscular injection. It works throughout the body, so it does not need to be injected near the injury.
Reconstitution and dosing calculator
Usually comes in 2 mg, 5 mg or 10 mg vials, mixed with 2 mL of bacteriostatic water.
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This tool does arithmetic only. It does not choose a dose or confirm that any substance is right for you. Double-check every result against your syringe and your clinician’s instructions.
Side effects and safety
- Users report it is generally well tolerated: occasional head rush, tiredness or injection-site redness.
- Because it promotes new blood vessels and cell movement, people with active cancer are usually advised to avoid it.
- Avoid during pregnancy and breastfeeding.
- Prohibited in competitive sport (WADA).
Common stacks
- BPC-157: the classic healing pairing.
- GHK-Cu: for skin and tissue repair.
Storage
Powder: refrigerate or freeze. After mixing: refrigerate at 2–8 °C and use within about 3–4 weeks.
Compare with
- TB-500: a short fragment (the active region) that is cheaper and more common.
- BPC-157: a different healing peptide, especially popular for tendons and the gut.
Frequently asked questions
Thymosin Beta-4 or TB-500?
Thymosin Beta-4 is the full natural protein, which has the human trial data. TB-500 is a short fragment of its active region. Users report similar results.
References
- Goldstein AL, et al. Thymosin β4: a multi-functional regenerative peptide. Basic properties and clinical applications. Expert Opin Biol Ther. 2012;12(1):37-51.
- Smart N, et al. Thymosin β4 induces adult epicardial progenitor mobilization and neovascularization. Nature. 2007;445(7124):177-182.