Thymosin Beta-4 (Thymosin Beta-4 (Full Length))
A 43-amino acid peptide that is the primary G-actin sequestering molecule in mammalian cells. Plays a critical role in tissue repair, regeneration, and protection after injury.
How it works
Sequesters G-actin to regulate cytoskeleton dynamics, promotes stem cell differentiation, and activates anti-inflammatory and anti-apoptotic pathways.
Key facts
- Molecular weight: 4921 Da
- Half-life: ~6-8 hours
- Bioavailability: ~95% subcutaneous
- Storage: Lyophilized: -20°C. Reconstituted: 2-8°C for up to 14 days.
Dosing overview
- Typical dose: 1-5 mg
- Frequency: 2-3x per week
- Duration: 4-12 weeks
- Route: Subcutaneous injection
Protocol notes
- Loading phase: commonly ~2-5 mg split across 2-3 subcutaneous injections per week for the first 4-6 weeks.
- Maintenance phase: a single 2-5 mg dose once weekly (or every other week) to hold results.
- Frequently stacked with BPC-157 for soft-tissue and systemic recovery.
Reported benefits
- Comprehensive tissue repair
- Cardiac regeneration
- Neurological recovery
- Corneal healing
- Anti-fibrotic effects
Possible side effects
- Injection site swelling
- Temporary fatigue
- Mild headache
Research
- Thymosin beta-4 in cardiac repair (2020): Promoted cardiomyocyte survival and neovascularization post-ischemic injury.
- Corneal wound healing with Tβ4 (2018): Accelerated corneal re-epithelialization and reduced scarring in clinical evaluation.
Community reviews of Thymosin Beta-4
- injection_journal rated it 5/5 - Genuinely effective after 3 months: Been using Thymosin Beta-4 for about 3 months and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- deep_science_dee rated it 5/5 - Worth adding to the protocol: Thymosin Beta-4 has been a worthwhile addition. I am data-driven and tracked relevant markers before, during, and after. The improvement is measurable and correlates with the intervention timeline. What sets this apart from some compounds I have tried is the consistency. Benefits did not fluctuate wildly or disappear. They built up and maintained. That gives me confidence in the mechanism. Tolerance has been excellent. Nothing in my bloodwork or subjective experience raised any flags. This is the kind of compound that does its job quietly without causing problems. Exactly what you want.
- compound_curious rated it 5/5 - Noticed clear benefits within weeks: Added Thymosin Beta-4 to my protocol about 6 months ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
- peptidehead720 rated it 4/5 - good for keeping me training when i was beat up: i ran thymosin beta-4 for about 4 months while i was still lifting, coaching clients, and trying to keep my own shoulders and elbows from filing a complaint, which at 50 feels like a fairer description than "aging gracefully". for me it fit into daily life pretty quietly, no drama, just seemed to let me keep moving through the usual little strains that pile up from demoing lifts and carrying too much gear around a cold canadian winter. the one caveat was that i never got a dramatic, obvious punch from it, it was more subtle than that. tbh i liked that, because i could still work, train, and r
- earlyrenee rated it 4/5 - Faster tendon calm after my weekend runs: The biggest thing for me was that my cranky Achilles felt way less irritated after about 4 weeks, which mattered a lot since I’m on my feet all day in the city and still try to run on the weekends. Could’ve been other stuff too, but it seemed to help my recovery. Small caveat, I’d keep an eye on expectations.
- quiet_macros rated it 5/5 - 8 weeks that finally let my body catch up: honestly, i tried thymosin beta-4 after a nasty run of beat-up shoulders and achy elbows from coaching crossfit all day plus my own lifting. i’m in my 30s, living down south, and i was tired of feeling like every little tweak lingered forever. over about 8 weeks, it seemed to help my tissues calm down faster and i was back under the bar with way less crankiness. i can’t prove what did what, and it could’ve been a mix of better sleep and smarter training, but for me the change was real enough to notice?
Compare Thymosin Beta-4
Community discussions about Thymosin Beta-4
Research and educational reference only. Not medical advice.