Half-lives / IGF-1 LR3
IGF-1 LR3 half-life
IGF-1 LR3 stays in your system about 5 days — five half-lives at a half-life of ≈ 20–30 h (24 h). The computed decay curve is below, with the primary source cited.
Also searched as: igf1 lr3, long r3 igf-1, igf1lr3.
Source: IGF-1 LR3 analog characterization (Francis 1992, PMID 1378742); ≈20–30 h (animal-derived, not human-verified)
Frequently asked
How long does IGF-1 LR3 stay in your system?
With a half-life of ≈ 20–30 h, roughly 97% of a single IGF-1 LR3 dose is cleared after five half-lives — about 5 days. Repeated dosing accumulates and takes correspondingly longer to clear.
What does a ≈ 20–30 h half-life mean in practice?
Every 20–30 h, 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 IGF-1 LR3 half-life number come from?
IGF-1 LR3 analog characterization (Francis 1992, PMID 1378742); ≈20–30 h (animal-derived, not human-verified). We cite a primary source for every half-life we publish and version every change.
Related: IGF-1 LR3 reconstitution calculator · IGF-1 LR3 dose charts
Related half-lives
Other Growth-hormone & IGF axis — how long each stays active:
Guides mentioning IGF-1 LR3
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.