Published by Peptide Protocols · Reviewed September 2026 · How we make these pages · Educational & research purposes only — not medical advice.
TB-500 comes up constantly in recovery and tissue-repair conversations — usually right next to a lot of hype and not much plain explanation. If you've been trying to figure out what it actually is versus what the internet claims, here's the straightforward version.
TB-500 is a synthetic peptide — a short, lab-made chain of amino acids. It's based on a fragment of a naturally occurring protein called Thymosin Beta-4, which is found throughout the body and is involved in cell movement and tissue organization. In the research world, TB-500 is studied as a research compound, labeled for research use only, not as an approved consumer product.
Most published work on TB-500 and the Thymosin Beta-4 family is preclinical (lab and animal studies). Researchers have explored its role in areas such as:
An honest caveat: much of this is early-stage, preclinical research, and human clinical data is limited. Treat it as "what studies are exploring," not "what it's proven to do for people." Always work with a qualified professional.
TB-500 is most commonly researched as an injectable, reconstituted from a lyophilized (freeze-dried) powder. You may also see it discussed in topical contexts. The form changes how it's handled, stored, and measured — exactly the kind of detail our reference guides lay out clearly.
If you're working with the injectable research form, the lyophilized powder is reconstituted with bacteriostatic water before handling. The concentration you create (mg of peptide ÷ mL of water) drives every measurement after it — get that number right and everything downstream stays accurate. Our cheat sheets and Universal Excel Logbook do this math for you with tick-mark tables for dozens of peptides, including TB-500.
This is where most people get burned — quality varies wildly between suppliers. Before buying from anyone, check that they:
We do not recommend or partner with any peptide supplier. Use the checklist instead: third-party COAs that match your batch and lot, stated purity, clear research-use labeling, real support and proper cold-chain shipping.
The supplier checklist →Educational content only. Confirm the legal status where you live before ordering anything.
It's typically sold labeled for research use only — not for human consumption. Regulations vary by country and change over time, so always confirm what's permitted in your location. This is educational content, not legal advice.
TB-500 is a synthetic peptide based on an active fragment of the natural protein Thymosin Beta-4. They're related but not identical, which is why you'll often see the two names mentioned together in the research community.
It's featured across several — including the Muscle & Recovery, Hair Loss, and Skin, Hair & Nails cheat sheets.
Get the per-compound cheat sheets — the research, reconstitution math, timing, and a tracking logbook in one place.
Browse the full library on Etsy →The one formula, a BAC-water chart, and the 10 most-researched beginner peptides — the math done for you. Print it for the fridge.
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