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IGF-1 LR3 1 mg Vial: Reconstitution and Dosing Chart

How much bacteriostatic water to add to a 1 mg vial of IGF-1 LR3, the concentration you get, and a full dose-to-units chart.

Medically reviewed by Juan Pablo Frías, MD · · DisclosureIGF-1 analogUpdated
Vial size
1 mg
With 2 mL water
0.5 mg/mL
common choice
10 units contain
50 mcg
at 2 mL, U-100
Whole vial
200 units
2 mL on a U-100 scale

How much water to add

Bacteriostatic water only changes the concentration, not the amount of IGF-1 LR3 in the vial. More water means more units per dose (easier to read), less water means fewer.

IGF-1 LR3 1 mg vial: concentration by water added
Water addedConcentration10 units contain100 mcg isWhole vial
0.5 mL2 mg/mL200 mcg5 u50 u
1 mL1 mg/mL100 mcg10 u100 u
2 mL0.5 mg/mL50 mcg20 u200 u

Calculator and full dosing table

Preset to the 1 mg vial. Change any value; the table below the result updates with it.

1Vial size
2Bacteriostatic water added
3Dose per injection
4Syringe (U-100)
Draw to
20units
= 0.2 mL on a 1 mL U-100 insulin syringe
1 mg vial2 mL water100 mcg dose
Concentration
0.5 mg/mL
Doses per vial
10
Weeks (1 dose/wk)
10
Math only. It does not recommend a dose.

20 units (0.2 mL) on a 1 mL U-100 syringe: 100 mcg from a 1 mg vial + 2 mL water (IGF-1 LR3).

Dosing table for a 1 mg vial

Syringe units (U-100) for each dose, by how much bacteriostatic water you add.

IGF-1 LR3: U-100 syringe units per dose for a 1 mg vial
Dose0.5 mL water1 mL water2 mL water
10 mcg0.512
20 mcg124
50 mcg2.5510
100 mcg51020

How the math works

Concentration is the vial's milligrams divided by the water you add. Volume to draw is your dose divided by that concentration. On a U-100 syringe, 1 mL is 100 units, so units = mL × 100.

1 mg ÷ 2 mL = 0.5 mg/mL
100 mcg = 0.1 mg; 0.1 mg ÷ 0.5 mg/mL = 0.2 mL
0.2 mL × 100 = 20 units
20 units · 0.2 mL · 100 mcg from 1 mg + 2 mL
Math only. The amounts in these tables are reference values for the arithmetic, not dose recommendations.

Common questions

How much water goes in a 1 mg vial of IGF-1 LR3?

That choice only changes the concentration. With 2 mL, a 1 mg vial is 0.5 mg/mL; with 1 mL it is 1 mg/mL. Less water means fewer units per dose and harder-to-read marks for small doses.

How many units is 100 mcg from a 1 mg vial?

With 2 mL of water, 100 mcg is 20 units on a U-100 syringe. With other water amounts, see the table.

How many doses are in a 1 mg vial?

Divide the vial size by the dose (in the same unit). The calculator on this page shows the number of whole doses for any dose you pick.

More on IGF-1 LR3

DosageDoses used in published studies, with the source for each.CalculatorVial, water and dose to syringe units.Side effectsWhat labels and studies report, and what is unknown.ResultsStudy outcomes and when they were measured.PricePrice per mg and per week from dated listings. No vendor links.How to injectSites, syringe types and hygiene, step by step.

Sources

  1. 1Metric (SI) Prefixes (NIST Reference on Constants, Units, and Uncertainty)National Institute of Standards and Technology (NIST) · 2025physics.nist.govAccessed 2 Oct 2026
  2. 2BASAGLAR (insulin glargine) injection, prescribing information (DailyMed)U.S. Food and Drug Administration / DailyMed (Eli Lilly and Company label) · 2026dailymed.nlm.nih.govAccessed 2 Oct 2026

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