# TB-500 FAQ: Cardiac, Safety, Dosage, and Legal Questions | TB-500

> TB-500 FAQ: what it is, how it works, the cardiac and angiogenesis findings, the tumor safety signal, the half-life question, WADA status, and the FDA 503A category — answered and cited.

Twenty-five questions on TB-500 — identity, mechanism, the cardiac signal, safety, dosage, and access — each answered directly and graded by the heat of its evidence.

## Identity and use

What TB-500 is, what its name means, and what it is studied for.

## Mechanism and the heart

How TB-500 acts on actin, and the cardiac findings that form the hottest cluster.

## Efficacy and tissue repair

What the wound, muscle, tendon, hair, and inflammation findings actually show.

## Safety and timeline

The tumor signal, long-term unknowns, side effects, and how the animal timelines read.

## Legal and regulatory

FDA approval, the 503A category, compounding access, and WADA standing. The full picture is on the legal-status page.

---

A reading of the TB-500 and thymosin beta-4 record graded by heat — each finding rated for how hot its data run, the parent-protein substitutions flagged cell by cell, and the human-evidence band left cold and labeled; no clinic behind the matrix and nothing here prescribed or sold.