Positive committee recommendation — pending FDA rulemaking
Where to Buy TB-500
TB-500 has no seller list here on purpose, and the reason is on the record rather than left for a reader to infer.
TB-500 is easy to buy and hard to buy well. It moves through the same vendor channel as the compounds it is usually bundled with, and none of those sellers can be compared here on facts a reader could check. The dated regulatory note on this board carries the position behind that.
A ranked list would imply that the choice between vendors is the meaningful decision. For TB-500 it is not. The prior question is what is actually being sold and under what authority, and a table with a sorted score column would quietly skip past it.
The board stays empty and named rather than removed. Someone searching for this compound should land on a page that explains the silence, not on a redirect to something the site would rather sell them.
Regulatory status, as of July 2026
TB-500 came up on the first day of the FDA Pharmacy Compounding Advisory Committee meeting, July 23, 2026. The committee voted 8-6, with one abstention, in favor of adding it to the Section 503A bulk drug substances list. Read that alongside the agency's own briefing position: FDA staff had asked the committee to add none of the fourteen peptide forms under consideration. The recommendation was made over that stated objection, not in agreement with it. A recommendation is still only a recommendation. The committee does not write the rule. Compounding TB-500 for patients remains unlawful unless and until the FDA accepts the vote and then finishes proposed and final rulemaking. No schedule for that rulemaking has been published, and the outcome remains open.
A board appears here once the FDA has finished the rulemaking that would make TB-500 compoundable, and a verifiable US provider is dispensing it under a named pharmacy with a published price. Even then, the list of genuinely compliant sellers may well be short. An empty board is better than a padded one.
What this board covers
Nothing today. A compound earns a scored board here once a licensed US telehealth seller dispenses it under facts a reader can verify independently. Research-channel vendors do not meet that standard, and the honest version of this page is one with no rows in it.
What TB-500 is
TB-500 is a synthetic version of a fragment of thymosin beta-4, a protein involved in cell movement and tissue repair. It sells through the research-chemical channel, usually alongside the same compounds it is grouped with in vial listings. No FDA-approved TB-500 product exists in any indication. This page describes its regulatory position and nothing more.
What the evidence shows
What exists is preclinical: cell and animal studies on wound and tissue repair, plus a long tail of athlete and forum reports that are not evidence in any usable sense. No controlled human trial base has been published for TB-500, which is why it sits in the lowest evidence tier. Being under-studied is not the same as being proven harmful, and it is presented here as neither.
What to watch for
- TB-500 sold as a two-vial kit with another research compound. Bundling makes a purchase look like a protocol, and neither vial gains support from sitting next to the other.
- The synthetic fragment described as identical to the natural protein it derives from. They are not the same molecule, and the substitution is doing persuasive work in nearly every listing that makes it.
- Athlete testimonials and forum threads presented as a track record. Volume of anecdote is not evidence, and the loudest reports are the least checkable.
- A research-use-only label treated as a formality. It states who the material was sold to, and a seller framing it as red tape is telling a reader how it plans to handle the next question too.
Frequently asked questions
Why are no TB-500 sellers listed?
Because none can be compared here on published, verifiable facts. The dated regulatory note on this board sets out the position that decision rests on.
Vendors ship TB-500 today. Why not rank those?
Ranking them would present a choice between them as the real decision, and it is not. Their material moves through the research channel, which is a different thing from a dispensed prescription however the storefront is dressed.
Does an empty board mean TB-500 is unsafe?
No. The board describes what can be lawfully dispensed and independently verified. A safety verdict would need evidence this site does not have and would not print without.
Why does BPC-157 also have an empty board?
The two compounds sit in a similar position and are sold together constantly. Each keeps its own dated status record, because a shared summary would blur details that differ between them.
What would a filled-in TB-500 board look like?
It would carry a scored table built the same way as every other board on the site, from published facts. Until then it carries a dated status note and no table at all.