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Introduction: Thymosin β(4), a low molecular weight, naturally-occurring peptide plays a vital role in the repair and regeneration of injured cells and tissues. After injury, thymosin β(4), is released by platelets, macrophages and many other cell types to protect cells and tissues from further damage and reduce apoptosis, inflammation and microbial growth. Thymosin β(4) binds to actin and promotes cell migration, including the mobilization, migration, and differentiation of stem/progenitor cells, which form new blood vessels and regenerate the tissue. Thymosin β(4) also decreases the number of myofibroblasts in wounds, resulting in decreased scar formation and fibrosis.

Posted by Nick on 13th May 2025
Best TB 500 if ever used. Great results within a week, will be using exclusively from here. Tried other suppliers this is by far the best! Used their GHK and BPC as well, both equally as impressive. Also worth mentioning, best customer service I’ve experienced.
Posted by normstar on 30th Dec 2024
Great quality product, fast shipping and excellent customer service!
Posted by Unknown on 24th Sep 2024
I used this on a tricep injury in preparation for the Spartan Beast in Killington Vermont. It helped heal my injury so I could better use my arm on the obstacles.
Posted by Anthony T on 11th Sep 2023
I love the TB 500 and BPC 157 from this site. I've competed in strongman at a high level for over a decade and like most athletes my injuries' caught up to me, especially in my knees and wrists. I could barely get up my stairs without the railing. After just two day of sub q inj I was up and down and all around again with a very significant reduction in my pain. Amazing products game changing for my overall living and quality of life.
Posted by Tb500 on 1st Sep 2023
Top notch, can’t find better.
Posted by rronin99 on 28th Mar 2023
I was suffering with pretty severe bicep tendinopathy 2yrs ago. It hurt to even flex my bicep. No amount of rest really helped. I'm 45yrs old, so I just dealt with the pain and went back to working out. I've gotten TB500 & BPC-157 from other sites, which did produce some positive results, but it would get worse once I stopped using them. Gymntonic's TB500 stacked with their bpc-157, 100% healed my bicep. There is literally zero pain now. I didn't even have to stop working out for it to work. Also, it's been several months off the peptides and the bicep still feels great. This stuff is definitely the real deal and I am super grateful!!!
Posted by TB500 on 21st Mar 2023
Healed me. For some reason this is better then other brands I have tried.