Peptide Reconstitution Calculator
Draw this amount:10units
Concentration2.5 mg/mL
Volume to inject0.10 mL
Doses per vial20
How to Use This Peptide Calculator
1
Enter Peptide Amount
Input the total milligrams (mg) in your peptide vial. Common sizes: 2mg, 5mg, 10mg.
2
Add Water Volume
Enter how much bacteriostatic water (BAC water) you'll add. More water = easier to measure small doses.
3
Set Your Dose
Enter your desired dose in micrograms (mcg). The calculator shows exact syringe units to draw.
How IGF-1 LR3 Is Dosed
IGF-1 LR3 (Long R3 IGF-1) is a modified form of insulin-like growth factor 1 designed to resist the binding proteins that normally bind native IGF-1, which leaves more of it active.
An important correction: the half-life figure of 20 to 30 hours repeated across many websites is not from human pharmacokinetic data and is not reliable. Animal clearance data actually suggest that LR3 is cleared faster than native IGF-1, not slower, because it evades binding proteins. The roughly 20 hour value that circulates in fact belongs to native IGF-1 for contrast (Guler et al., 1989, PMID 2558477). We therefore do not present a half-life curve for IGF-1 LR3.
Because vials are small (often 1 mg) and doses are in micrograms, careful reconstitution matters. Community protocols use roughly 20 to 100 mcg per day. The calculator converts your chosen mcg dose into exact syringe units.
IGF-1 LR3 is a research compound. The doses shown are drawn from published trials or community protocols and are not clinically validated for self-administration. This tool is educational only and is not medical advice or a dosing recommendation.
IGF-1 LR3 Dosing Reference
| Peptide | Common Vial | Cited Dose | BAC Water | Units to Draw |
|---|---|---|---|---|
| IGF-1 LR3 | 1mg | 50mcg | 1mL | 5 units |
| IGF-1 LR3 | 1mg | 20mcg | 1mL | 2 units |
| IGF-1 LR3 | 1mg | 100mcg | 2mL | 20 units |
Community protocol figures, not clinically validated. For education only.
The Math Behind Peptide Reconstitution
Concentration formula:
Concentration (mg/mL) = Peptide (mg) ÷ Water (mL)Units to draw:
Units = [Dose (mcg) ÷ 1000] ÷ Concentration × 100Example: BPC-157 250mcg dose
- 5mg vial + 2mL BAC water = 2.5 mg/mL
- 250mcg = 0.25mg
- 0.25mg ÷ 2.5 mg/mL = 0.10mL
- 0.10mL × 100 = 10 units on insulin syringe
Printable reconstitution chart, free
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Discover Peptide LabUnderstanding Insulin Syringe Units
10 units = 0.10 mL
Quick Reference
- 100 units = 1 mL (full syringe)
- 50 units = 0.5 mL (half syringe)
- 10 units = 0.1 mL (1/10th syringe)
- 1 unit = 0.01 mL
Standard insulin syringes are U-100, meaning 100 units per mL. This calculator uses this standard.
Frequently Asked Questions
What is the real half-life of IGF-1 LR3?
The 20 to 30 hour figure repeated on many sites is not from human pharmacokinetic data and is not reliable. Animal data suggest LR3 is actually cleared faster than native IGF-1 because it evades binding proteins. There is no published human half-life, so we do not display a half-life curve for it.
Why is IGF-1 LR3 dosed in such small amounts?
It is potent and vials are typically only 1 mg, so doses are in the tens of micrograms. Accurate reconstitution and careful measurement matter more here than with larger-vial peptides.
How is IGF-1 LR3 different from native IGF-1?
LR3 is modified to resist the binding proteins that bind native IGF-1, so a larger fraction stays free and active. Its advantage is higher free availability and potency, not a longer half-life.
What is bacteriostatic water (BAC water)?
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol as a preservative. It prevents bacterial growth, allowing multi-use of reconstituted peptides for 4-6 weeks when refrigerated.
How much water should I add to my vial?
Common choices are 1mL, 2mL, or 3mL. More water makes small doses easier to measure accurately but means larger injection volumes. 2mL is a good balance for most peptides.
What does "units" mean on an insulin syringe?
Insulin syringes use "units" as measurements. Standard U-100 syringes have 100 units per 1mL, so 10 units = 0.10mL and 50 units = 0.50mL.
How long do reconstituted peptides last?
With bacteriostatic water, most peptides remain stable for 4-6 weeks when refrigerated at 2-8 degrees Celsius. With sterile water (no preservative), use within 24-48 hours.
Is this calculator free to use?
Yes, completely free with no signup required. For injection tracking, body maps and protocol management, see our full Peptide Lab app.