TB-500 (Thymosin Beta-4)
A synthetic version of the naturally occurring Thymosin Beta-4 protein, known for potent healing and anti-inflammatory effects.
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Compound Profile
TB-500 (Thymosin Beta-4)
Key Data
Research reference only
Research Focus
Preclinical data
⚠ Research & Educational Use Only. TB-500 (Thymosin Beta-4) is a research chemical documented here for scientific education. All information references peer-reviewed literature and preclinical/clinical study data. Not for human consumption. Not medical advice. Consult a licensed researcher or healthcare professional before any laboratory use.
- Systemic healing — addresses injuries throughout the body
- Promotes tissue repair in tendons, ligaments, and muscles
- Reduces inflammation and oxidative stress
- TB-500 (Thymosin Beta-4) is not FDA-approved for human use. It is a research chemical for scientific study only.
Research At a Glance
- Systemic healing — addresses injuries throughout the body
- Promotes tissue repair in tendons, ligaments, and muscles
- Reduces inflammation and oxidative stress
- Enhances flexibility and range of motion
In Plain English
Simple summaryThymosin beta-4 is a naturally occurring 43-amino acid peptide found in every cell in your body -- it's particularly concentrated in platelets and wound fluid, which tells you something about its job. Your body already uses it to regulate cell migration and tissue repair after damage. The synthetic version used in research mimics that activity, and it's been studied most extensively for cardiac muscle, skeletal muscle, and eye repair. If you've seen people stack TB-500 with BPC-157, there's a logical reason: they cover different tissue targets and work through partially different mechanisms, so combining them during active injury recovery makes sense to researchers.
- Systemic healing — addresses injuries throughout the body
- Promotes tissue repair in tendons, ligaments, and muscles
- Reduces inflammation and oxidative stress
The full scientific detail, mechanisms, citations, and dosing data, follows below.
What is TB-500 (Thymosin Beta-4)?
Tap any underlined term for an instant definition.
TB-500 is a synthetic peptide derived from Thymosin Beta-4, a naturally occurring protein found in virtually all human and animal cells. It plays a crucial role in actin sequestration, cell migration, blood vessel development (angiogenesis), and wound healing. TB-500 is particularly noted for its systemic healing properties — unlike BPC-157 which works best locally, TB-500 circulates through the bloodstream and can address injuries throughout the body simultaneously. It is especially popular in veterinary research for treating injured horses and has been extensively studied for tendon, ligament, muscle, and cardiac repair.
By the Numbers
Key Research Benefits
Documented effects observed in preclinical and clinical studies on TB-500 (Thymosin Beta-4). See all Healing & Recovery peptides for comparison.
Common Stacks
TB-500 (Thymosin Beta-4) is frequently combined with the following peptides for synergistic effects. Click any peptide to compare profiles before deciding.
The most popular healing stack - BPC-157 and TB-500 have complementary mechanisms covering local and systemic repair.
Adding a GH secretagogue amplifies the systemic anabolic and recovery signals TB-500 promotes.
Side Effects & Risks
Adverse effects reported in the research literature. All data sourced from preclinical and clinical study reports. View all peptides' side effects →
Dosing Data from the Literature
Doses referenced below are sourced from published preclinical and clinical studies. Use the peptide dose calculator to convert these values to injection volume.
Typical research dosing: 2–2.5 mg twice weekly for the first 4–6 weeks (loading phase), then 2–2.5 mg twice monthly for maintenance. TB-500 has a longer half-life than BPC-157, so less frequent dosing is needed.
Administration in Research Settings
Standard reconstitution and administration methodology for laboratory research use.
Reconstitute with bacteriostatic water. Can be administered subcutaneously or intramuscularly. Subcutaneous injection in the abdomen is most common. The loading phase helps saturate systemic levels. Often stacked with BPC-157 for comprehensive healing protocols.
What the research doesn't show
The cardiac and muscle repair evidence is almost entirely from rodent studies. Human data is limited to the dry eye corneal healing trial. The dramatic recovery benefits discussed in online communities have no direct human clinical evidence behind them.
Research Video
Medical Expert Videos
Physicians, researchers, and pharmacologists explain TB-500 (Thymosin Beta-4), covering mechanisms of action, clinical context, and study findings.
Videos sourced from YouTube search. KnowYourPeptide does not endorse any individual creator. For research education only.
The Bottom Line
TB-500 (Thymosin Beta-4) has a growing body of preclinical evidence and a well-characterised safety profile in research settings. The most-studied application is: systemic healing — addresses injuries throughout the body.
The most commonly reported side effect in research subjects is potential for head rush or dizziness post-injection. It is a research chemical, not approved for human use.
Frequently Asked Questions
Explore Further
Quick Reference
Research Articles
- Kylo Peptides Review: Published Lot COAs, the Koi Rebrand, and What the Membership Actually Saves7 min read
- FDA Peptide Reclassification 2026: What Researchers Need to Know10 min read
- Thymosin Alpha-1: The Immune-Optimizing Peptide Used Around the World8 min read
- TB-500: The Recovery Peptide Athletes Are Talking About8 min read
How It Compares
BPC-157 tends to have stronger evidence for tendon, ligament, and gut repair. TB-500 has stronger evidence for skeletal and cardiac muscle. The overlap in anti-inflammatory and angiogenic mechanisms is significant enough that many 4–8 week injury recovery protocols combine both.
Compare TB-500 (Thymosin Beta-4) side-by-sideResearch Use Only
This information is for educational research purposes only. This is not medical advice. Consult a qualified healthcare professional.