Half-lives / TB-500
TB-500 half-life
TB-500 stays in your system about 12.5 days — five half-lives at a half-life of ≈ 2–3 days (60 h). The computed decay curve is below, with the primary source cited.
Also searched as: tb500, tb4, thymosin beta-4.
Source: Thymosin β4 pharmacokinetic literature (see monograph)
Frequently asked
How long does TB-500 stay in your system?
With a half-life of ≈ 2–3 days, roughly 97% of a single TB-500 dose is cleared after five half-lives — about 12.5 days. Repeated dosing accumulates and takes correspondingly longer to clear.
What does a ≈ 2–3 days half-life mean in practice?
Every 2–3 days, the remaining amount halves: 100% → 50% → 25% → 12.5%, and so on. The curve above plots exactly this decay for a single dose.
Where does this TB-500 half-life number come from?
Thymosin β4 pharmacokinetic literature (see monograph). We cite a primary source for every half-life we publish and version every change.
Related: TB-500 reconstitution calculator · TB-500 dose charts
Related half-lives
Other Recovery, repair & longevity — how long each stays active:
Guides mentioning TB-500
See your own estimated levels
The Zyra Track app plots this curve from the doses you actually log — accumulation, overlaps, and all. Free during the founding period.
Zyra Track is a research and educational utility. Nothing on this page is medical advice, a dosing recommendation, or an endorsement of any compound. We never sell or source compounds and refuse sourcing questions. Consult a qualified clinician for decisions about your health.