CJC-1295 Reconstitution Calculator (mcg → units)
A 5 mg vial of CJC-1295 mixed with 2 mL of bacteriostatic water holds 2,500 mcg/mL, so a 100 mcg dose is 0.04 mL — 4 units on a U-100 insulin syringe. Change the vial, water or dose below, or read the chart for other mixes.
CJC-1295 dilution chart: 100 mcg in units
| Vial | + 1 mL water | + 2 mL water | + 3 mL water | Doses per vial |
|---|---|---|---|---|
| 2 mg | 5 U 0.05 mL · 2,000 mcg/mL | 10 U 0.1 mL · 1,000 mcg/mL | 15 U 0.15 mL · 667 mcg/mL | 20 |
| 5 mg | 2 U 0.02 mL · 5,000 mcg/mL | 4 U 0.04 mL · 2,500 mcg/mL | 6 U 0.06 mL · 1,667 mcg/mL | 50 |
1 mL = 100 units on a U-100 syringe. Water volume changes the units per dose, never the number of doses in the vial.
Measuring CJC-1295: the math that matters
CJC-1295 without DAC is quoted in small microgram amounts, which makes it one of the hardest compounds to draw accurately. With a 5 mg vial and 2 mL of bacteriostatic water the solution is 2,500 mcg/mL, so 100 mcg is 0.04 mL, or 4 units on a U-100 insulin syringe. From the same vial with only 1 mL it is 2 units, a single line on most 1 mL syringes.
More water or a smaller vial fixes this. A 2 mg vial with 2 mL is 1,000 mcg/mL, where every 10 units is exactly 100 mcg, the easiest mental math in the chart. A 5 mg vial with 3 mL brings 100 mcg to 6 units. If you are still under 10 units, a 0.3 mL or 0.5 mL insulin syringe usually has finer markings than a 1 mL one.
The biggest trap is that two different molecules share the name. CJC-1295 with DAC has a half-life measured in days and is quoted at 1 to 2 mg once a week, ten to twenty times the per-dose amount of the no-DAC version. Vials are often labelled simply "CJC-1295". Using no-DAC math on a DAC vial, or the reverse, gives a dose that is off by an order of magnitude, so check the label before entering anything.
CJC-1295 is often drawn together with ipamorelin at about 100 mcg of each. If the two come from separate vials, each needs its own calculation, and the units add up in the syringe. A 2 mg CJC-1295 vial and a 2 mg ipamorelin vial, both with 2 mL, give 10 units of each for 20 in total.
Common CJC-1295 measuring mistakes
- Not checking whether the vial is with or without DAC before calculating.
- Mixing a 5 mg vial with 1 mL and trying to measure 2 units.
- Entering 100 with the unit set to mg, which is 100,000 mcg.
- Adding the units of two compounds in one syringe without recalculating each one after a vial change.
- Assuming 2 mg and 5 mg vials behave the same at the same water volume. The 5 mg vial needs 2.5 times fewer units.