Use this IGF-1 LR3 calculator to convert vial strength and BAC water volume into a precise draw. IGF-1 LR3 is a long-acting insulin-like growth factor dosed in small micrograms; this page covers the math, not dosing decisions.
- Common vial examples
- 1 mg
- Example dose
- 50 mcg
- Common syringe
- U-100 insulin
- Last reviewed
Storage before and after reconstitution: Manufacturer datasheets reconstitute in dilute acid and store the solution frozen in portions; one supplier gives about 1 week at 2–8°C. Lyophilised 2–8°C or colder.
Quick answers: IGF-1 LR3 doses in units
With a 1 mg vial mixed with 1 mL of bacteriostatic water (1 mg/mL), on a U-100 insulin syringe:
- How many units is 20 mcg of IGF-1 LR3?
- 2 units (0.02 mL)
- How many units is 50 mcg of IGF-1 LR3?
- 5 units (0.05 mL)
- How many units is 100 mcg of IGF-1 LR3?
- 10 units (0.1 mL)
Educational maths only, not a dose recommendation. Use the calculator above for your own vial, water volume and syringe.
Quick math example
A 1 mg vial mixed with 1 mL gives 1,000 mcg/mL. A 50 mcg dose is 0.05 mL, which equals 5 units on a U-100 syringe.
IGF-1 LR3 reconstitution reference
U-100 units to draw for each common IGF-1 LR3 dose, by vial size, reconstituted with 1 mL of bacteriostatic water. Change the water volume in the calculator above to recompute for your own setup.
| Vial | Concentration | 20 mcg | 50 mcg | 100 mcg |
|---|---|---|---|---|
| 1 mg | 1 mg/mL | 2 u(0.02 mL) | 5 u(0.05 mL) | 10 u(0.1 mL) |
Swipe the table to see every dose →
Educational reference only — not a dose recommendation. Units assume a U-100 insulin syringe (100 units = 1 mL on U-100). Always confirm against your own vial, diluent, and clinician or pharmacy instructions.
IGF-1 LR3 dosage chart: units for a 1 mg vial
IGF-1 LR3 dosage charts list doses in micrograms, and the amounts most often cited in community protocols are 20 to 100 mcg a day, run in short cycles of around four weeks. IGF-1 LR3 is a research compound with no approved human use, and it is banned in sport, so this page does not recommend a dose. The chart shows what each amount looks like on a U-100 syringe for a 1 mg vial at three water volumes.
Doses this small sit near the bottom of the syringe, where a one-unit misread is a big share of the dose. More water spreads each dose over more marks: 50 mcg is 5 units in 1 mL but 15 units in 3 mL. Some suppliers specify 0.6% acetic acid instead of bacteriostatic water for IGF-1 LR3; the units maths is identical either way.
- 1 mg + 1 mL (1,000 mcg/mL): 50 mcg = 5 units · 100 mcg = 10 units
- 1 mg + 2 mL (500 mcg/mL): 50 mcg = 10 units · 100 mcg = 20 units
- A 1 mg vial holds twenty 50 mcg doses or ten 100 mcg doses
IGF-1 LR3 dosage chart in U-100 units
| Dose | 1 mg + 1 mL1 mg/mL | 1 mg + 2 mL0.5 mg/mL | 1 mg + 3 mL0.33 mg/mL |
|---|---|---|---|
| 20 mcg | 2 u(0.02 mL)50 per vial | 4 u(0.04 mL)50 per vial | 6 u(0.06 mL)50 per vial |
| 40 mcg | 4 u(0.04 mL)25 per vial | 8 u(0.08 mL)25 per vial | 12 u(0.12 mL)25 per vial |
| 50 mcg | 5 u(0.05 mL)20 per vial | 10 u(0.1 mL)20 per vial | 15 u(0.15 mL)20 per vial |
| 60 mcg | 6 u(0.06 mL)16 per vial | 12 u(0.12 mL)16 per vial | 18 u(0.18 mL)16 per vial |
| 80 mcg | 8 u(0.08 mL)12 per vial | 16 u(0.16 mL)12 per vial | 24 u(0.24 mL)12 per vial |
| 100 mcg | 10 u(0.1 mL)10 per vial | 20 u(0.2 mL)10 per vial | 30 u(0.3 mL)10 per vial |
Swipe the table to see every vial →
Educational reference only — not a dose recommendation. Units assume a U-100 insulin syringe (100 units = 1 mL on U-100); “per vial” is how many of that dose the vial holds, before the small dead-space loss on each draw. Confirm against your own vial label, diluent, and clinician or pharmacy instructions.
How the IGF-1 LR3 calculation works
IGF-1 LR3 vials are small — often 1 mg — and doses are tens of micrograms. The calculator converts the vial total to mcg, divides by water volume for concentration, then divides your target dose by that concentration.
- 1 mg vial = 1,000 mcg total
- 1,000 mcg / 1 mL = 1,000 mcg per mL
- 50 mcg target = 0.05 mL draw
IGF-1 LR3 1 mg vial with 1 mL example
A 1 mg IGF-1 LR3 vial mixed with 1 mL gives 1 mg/mL, or 1,000 mcg/mL.
A 50 mcg dose is 0.05 mL — 5 units on a U-100 syringe. A 100 mcg dose is 0.1 mL (10 units); a 20 mcg dose is 0.02 mL (2 units).
- 1 mg / 1 mL = 1,000 mcg/mL
- 50 mcg / 1,000 mcg per mL = 0.05 mL = 5 units
- 100 mcg / 1,000 mcg per mL = 0.1 mL = 10 units
Very small doses, precise draws
Because IGF-1 LR3 doses are tens of micrograms, the draw can be just a couple of units, where a one-unit error is a large percentage of the dose. Reconstituting with more water spreads the dose across more unit marks for easier measuring.
- Sub-100 mcg doses need careful measuring
- More BAC water = larger, easier-to-read draw
- A U-100 insulin syringe is the practical choice
How to reconstitute IGF-1 LR3: acetic acid or BAC water?
IGF-1 LR3 is less forgiving than most peptides. The manufacturer of LONG R3 IGF-I (Repligen) reconstitutes it in 100 mM acetic acid (about 0.6%) to 1 mg/mL, and other suppliers' datasheets use dilute acid too, because the protein dissolves and stays stable poorly at neutral pH. Bacteriostatic water is what many research vials are sold with, but it is not what the manufacturer specifies.
The diluent changes stability, not the maths. A 1 mg vial in 1 mL is 1 mg/mL whichever liquid you use, so 50 mcg is 0.05 mL — 5 units. Datasheets also advise keeping the stock at 1 mg/mL or stronger and storing it frozen in portions; one supplier gives about a week at 2–8 °C.
- Manufacturer: 100 mM (~0.6%) acetic acid to 1 mg/mL
- 1 mg in 1 mL = 1 mg/mL → 50 mcg = 5 units · 100 mcg = 10 units
- Store reconstituted stock frozen in portions; about 1 week refrigerated
Frequently asked questions
What is a typical IGF-1 LR3 dosage in units?
Is IGF-1 LR3 approved as a medicine?
What water volume should I use for a 1 mg IGF-1 LR3 vial?
Why are IGF-1 LR3 doses in micrograms?
Do you mix IGF-1 LR3 with acetic acid or bacteriostatic water?
Primary sources
Background references for this calculator. PepSync does not make clinical claims; these citations support the educational context only.
- 1LONG R3 IGF-I frequently asked questionsRepligen · n.d.
- 2R3 IGF-1 (ab58738) datasheetAbcam · n.d.