A 1 mg IGF-1 LR3 vial mixed with 1 ml of bacteriostatic water holds 1 mg/ml. A 40 mcg dose is 0.040 ml — 4 units on a U-100 insulin syringe — and the vial holds 25 doses of that size.
Units on a U-100 insulin syringe (100 units = 1 ml) for IGF-1 LR3 doses from 20 mcg to 80 mcg, by how much bacteriostatic water is in a 1 mg vial. The highlighted row is the 40 mcg dose used above.
| Dose | 1 ml water 1 mg/ml | 2 ml water 0.5 mg/ml | 3 ml water 0.333 mg/ml | Doses per vial |
|---|---|---|---|---|
| 20 mcg | 2 u 0.020 ml | 4 u 0.040 ml | 6 u 0.060 ml | 50 |
| 40 mcg | 4 u 0.040 ml | 8 u 0.080 ml | 12 u 0.12 ml | 25 |
| 80 mcg | 8 u 0.080 ml | 16 u 0.16 ml | 24 u 0.24 ml | 12 |
A 4-unit draw is hard to measure accurately — each tick on a U-100 syringe is 1 or 2 units. Mixing the same vial with 2 ml of water makes the same 40 mcg dose 8 units, which is easier to read. A 0.3 ml insulin syringe (30-unit capacity) with half-unit marks also helps.
Unit math only, not a dosing recommendation. The dose range is what published protocols and trials describe; see the IGF-1 LR3 guide for sources.
IGF-1 LR3 is a modified analog of insulin-like growth factor 1 with an extended half-life due to reduced IGF-binding-protein affinity. It is studied for anabolic and tissue-repair effects.
Half-life: Approximately 20–30 hours (substantially extended vs native IGF-1's ~10–20 minutes)
Typical dose range: 20–80 mcg per injection, typically once daily
Class: Modified insulin-like growth factor 1 analog
Regulatory status: Not FDA approved. Research use only.
Read the full IGF-1 LR3 guide → — mechanism, side effects, storage, regulatory status and citations. Or browse the whole peptide glossary.
Calculators for related peptides: IGF-1 DES, CJC-1295, GHRP-2, GHRP-6, Hexarelin.
Need a different unit or a different question? The peptide dose converter moves a dose between mcg, mg and IU, and the IGF-1 LR3 half-life chart shows how concentration accumulates across a dosing cadence. Loading IGF-1 LR3 into a reusable 3 ml pen instead of drawing it with a syringe? The peptide pen calculator turns the same vial into mcg per click and clicks to dial. All of them are listed on the free peptide tools page.
Both. This IGF-1 LR3 calculator converts vial strength, bacteriostatic-water volume, and target dose into milliliters and insulin-syringe units. It does not recommend a medical dose.
This page is pre-filled with 1 ml of bacteriostatic water for a 1 mg IGF-1 LR3 vial because that is a common research ratio. You can adjust the water amount in the full calculator.
4 units on a U-100 insulin syringe, when a 1 mg vial is mixed with 1 ml of bacteriostatic water (1 mg/ml). That is 0.040 ml. With a different amount of water the unit count changes — the dose chart on this page lists 1 ml, 2 ml, 3 ml mixes.
25 doses of 40 mcg. The number of doses depends only on vial strength and dose size — adding more or less water changes the volume of each draw, not how many draws the vial holds.
No. It only performs unit math. Dosing, titration, and whether IGF-1 LR3 is appropriate are clinical decisions that should be made with a licensed healthcare professional.
Peptide Protocol remembers your IGF-1 LR3 vial, shows the units for every dose, tracks what is left, and rotates injection sites for you.
Get the iPhone app →Educational use only. Peptide Protocol is an informational tool. Nothing on this page constitutes medical advice. Many peptides are prescription-only or restricted in your jurisdiction. Always consult a licensed healthcare professional before injecting any compound.