Lab arithmeticIGF-1 LR3Not approved (research only)
IGF-1 LR3 1 mg: dosing evidence and reconstitution math
A 1 mg vial of IGF-1 LR3 mixed with 2 mL of diluent is 500 mcg/mL, so 10 units on a U-100 syringe (0.1 mL) contain 50 mcg.
Is there an established dose?
No FDA label or published human trial defines a dose of IGF-1 LR3, so we do not publish one. Online "protocols" for it are not evidence.
- IGF-1 LR3 profile: FDA status, research volume and registered trials.
1 mg vial concentration table
Concentration = vial content ÷ diluent volume. A U-100 insulin syringe holds 1 mL in 100 units, so 1 unit = 0.01 mL.
| Diluent | Concentration | Per 10 units (0.1 mL) | Per 1 unit |
|---|---|---|---|
| 1 mL | 1 mg/mL | 100 mcg | 10 mcg |
| 2 mL | 500 mcg/mL | 50 mcg | 5 mcg |
| 3 mL | 333 mcg/mL | 33.3 mcg | 3.333 mcg |
| 5 mL | 200 mcg/mL | 20 mcg | 2 mcg |
Arithmetic only; it assumes the vial contains exactly what the label states. Independent tests often find vials under- or over-filled, which is why a lot's certificate of analysis matters.
Syringe units for a given amount
Units on a U-100 syringe needed to draw each amount from this 1 mg vial, by diluent volume. The amounts are fractions of the vial (1/50, 1/20, 1/10, 1/5), not dose suggestions.
| Amount | 1 mL diluent | 2 mL diluent | 3 mL diluent |
|---|---|---|---|
| 20 mcg | 2 units | 4 units | 6 units |
| 50 mcg | 5 units | 10 units | 15 units |
| 100 mcg | 10 units | 20 units | 30 units |
| 200 mcg | 20 units | 40 units | 60 units |
Units = amount ÷ concentration × 100. Draws above 100 units exceed a 1 mL syringe.
What the research covers
A PubMed search for LR3-IGF-1 OR "Long R3 IGF-I" returned 0 records (0 from the last five years), none indexed as clinical trials when checked on October 2026.
- Recombinant expression of IGF-1 and LR3 IGF-1 fused with xylanase in Pichia pastoris.
- Detection of His-tagged Long-R³-IGF-I in a black market product.
- Attenuated glucose-stimulated insulin secretion during an acute IGF-1 LR3 infusion into fetal sheep does not persist in isolated islets.
- The somatotropic axis in neonatal calves can be modulated by nutrition, growth hormone, and Long-R3-IGF-I.
- Long R3 insulin-like growth factor-I (IGF-I) infusion stimulates organ growth but reduces plasma IGF-I, IGF-II and IGF binding protein concentrations in the guinea pig.
Where research vials are listed
31 suppliers in our directory list IGF-1 LR3 (A–Z): Atomik Labz, BioGenix Peptides, Biotech Peptides, Bulk Peptide Supply, Core Peptides, Dynamic Peptide, Eros Peptides, Evolve BioPep, and 23 more. A listing is not a quality endorsement; ask for a lot-specific certificate of analysis.
Storage & handling
Follow the storage statement on the product sheet or certificate of analysis. Lyophilized (freeze-dried) peptides are generally kept cold, dry and away from light; once reconstituted, stability is shorter and depends on the compound and diluent. Bacteriostatic water contains 0.9% benzyl alcohol as a preservative; sterile water does not.
Frequently asked questions
How much bacteriostatic water for a 1 mg IGF-1 LR3 vial?
The diluent volume only sets the concentration: 1 mL gives 1 mg/mL, 2 mL gives 500 mcg/mL and 3 mL gives 333 mcg/mL. Smaller volumes are more concentrated, so each syringe unit holds more.
How much IGF-1 LR3 is in 10 units?
At 2 mL of diluent, 10 units (0.1 mL) of a 1 mg vial contain 50 mcg; at 1 mL they contain 100 mcg.
What is the dose of IGF-1 LR3?
No FDA label or published human trial defines a dose of IGF-1 LR3, so we do not publish one. Online "protocols" for it are not evidence.
Related pages
Peptide calculator BAC water calculator Growth hormone & GHRH protocols