Half-lives / TB-500
TB-500 half-life
≈ 2–3 days (60 hours ≈ 2.5 days) — computed decay curve below, primary source cited.
| Half-life | ≈ 2–3 days |
|---|---|
| ~97% cleared (5 half-lives) | ≈ 12.5 days |
| Typical route (published research) | SubQ · 2×/week |
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
Guides mentioning TB-500
See your own estimated levels
The Zyra Labs app plots this curve from the doses you actually log — accumulation, overlaps, and all — on your device, free to start.
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