Short answer: 2 mL of bacteriostatic water in a 9 mg sermorelin vial makes 4.5 mg/mL. On a U-100 insulin syringe (1 mL = 100 units), every 10 units then holds 450 mcg. More water gives a weaker solution and a bigger draw for the same amount; the amount in the vial stays 9 mg.
| Water added | Concentration | Per 10 units | Per 1 unit |
|---|---|---|---|
| 1 mL | 9 mg/mL | 900 mcg | 90 mcg |
| 2 mL | 4.5 mg/mL | 450 mcg | 45 mcg |
| 3 mL | 3 mg/mL | 300 mcg | 30 mcg |
| 5 mL | 1.8 mg/mL | 180 mcg | 18 mcg |
The amounts below are examples to show the conversion, not doses. How much to take is a decision for you and your prescriber.
| Water added | 100 mcg | 200 mcg | 400 mcg |
|---|---|---|---|
| 1 mL | under 2 units | 2.2 units | 4.4 units |
| 2 mL | 2.2 units | 4.4 units | 8.9 units |
| 3 mL | 3.3 units | 6.7 units | 13.3 units |
| 5 mL | 5.6 units | 11.1 units | 22.2 units |
A 9 mg vial holds 90 draws of 100 mcg, 45 draws of 200 mcg, 22.5 draws of 400 mcg, no matter how much water you add.
9 mg ÷ 2 mL = 4.5 mg/mLamount ÷ 4.5 mg/mL = mLmL × 100 = unitsFor a different water volume or amount, the free peptide reconstitution calculator works backwards from the amount you want and suggests a water volume that lands on a clean syringe mark.
Sermorelin 2 mg · Sermorelin 6 mg
Half-life, time to peak and sources are on the main Sermorelin guide.