Use this CJC-1295 with DAC calculator to turn your vial strength and bacteriostatic water into an exact draw in mL and syringe units. The DAC version lasts for days rather than minutes, so it is dosed far less often and in larger amounts than CJC-1295 without DAC. It is a research peptide, not an approved medicine; this page covers the maths only.
- Common vial examples
- 2 / 5 mg
- Example dose
- 500 mcg
- Common syringe
- U-100 insulin
- Last reviewed
Quick math example
A 2 mg vial mixed with 2 mL gives 1 mg/mL, or 1,000 mcg/mL. A 500 mcg dose is 0.5 mL, which equals 50 units on a U-100 syringe.
CJC-1295 with DAC reconstitution reference
U-100 units to draw for each common CJC-1295 with DAC dose, by vial size, reconstituted with 2 mL of bacteriostatic water. Change the water volume in the calculator above to recompute for your own setup.
| Vial | Concentration | 500 mcg | 1 mg | 2 mg |
|---|---|---|---|---|
| 2 mg | 1 mg/mL | 50 u(0.5 mL) | 100 u(1 mL) | 200 u(2 mL) |
| 5 mg | 2.5 mg/mL | 20 u(0.2 mL) | 40 u(0.4 mL) | 80 u(0.8 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.
CJC-1295 DAC dosage chart: weekly doses in units
CJC-1295 with DAC is usually dosed by the week. Community protocols most often cite 1 to 2 mg a week, given as one injection or split into two. The original human study gave single or repeated weekly and every-other-week injections and measured a half-life of about 6 to 8 days. There is no approved dose and this page does not recommend one; the chart shows what each amount looks like on a U-100 syringe.
A 2 mg vial is one to four doses at these amounts, so the water volume mainly decides how readable each draw is. In 1 mL a 1 mg dose is 50 units; in 2 mL it is a full 100 units.
- 2 mg + 1 mL (2 mg/mL): 500 mcg = 25 units · 1 mg = 50 units
- 2 mg + 2 mL (1 mg/mL): 500 mcg = 50 units · 1 mg = 100 units
- 5 mg + 2 mL (2.5 mg/mL): 1 mg = 40 units · 2 mg = 80 units
CJC-1295 with DAC dosage chart in U-100 units
| Dose | 2 mg + 1 mL2 mg/mL | 2 mg + 2 mL1 mg/mL | 5 mg + 2 mL2.5 mg/mL |
|---|---|---|---|
| 500 mcg | 25 u(0.25 mL)4 per vial | 50 u(0.5 mL)4 per vial | 20 u(0.2 mL)10 per vial |
| 1 mg | 50 u(0.5 mL)2 per vial | 100 u(1 mL)2 per vial | 40 u(0.4 mL)5 per vial |
| 1.5 mg | 75 u(0.75 mL)1 per vial | 150 u(1.5 mL)1 per vial · over 1 mL | 60 u(0.6 mL)3 per vial |
| 2 mg | 100 u(1 mL)1 per vial | 200 u(2 mL)1 per vial · over 1 mL | 80 u(0.8 mL)2 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, diluent, and clinician or pharmacy instructions.
CJC-1295 with DAC vs without DAC
DAC (drug affinity complex) is a chemical linker that lets the peptide bind to albumin in the blood, which stretches its half-life from about 30 minutes to about a week. CJC-1295 without DAC, also sold as Mod GRF 1-29, is short-acting and is usually discussed at around 100 mcg several times a day; the DAC version at around 1 to 2 mg a week.
The two are not interchangeable and the doses must never be swapped: a no-DAC dose taken from a DAC vial on a daily schedule would stack up over the week. Check which one your vial is before you calculate.
- With DAC: half-life about 6–8 days, dosed weekly or twice weekly
- Without DAC (Mod GRF 1-29): half-life about 30 minutes, dosed daily
- Same vial maths, very different schedules
How the CJC-1295 DAC calculation works
The vial is labelled in milligrams and doses are written in micrograms or milligrams. The calculator converts the vial to mcg, divides by your water volume for the concentration, then divides your dose by that concentration to get the mL and syringe units.
- 2 mg vial = 2,000 mcg total
- 2,000 mcg / 2 mL = 1,000 mcg per mL
- 500 mcg target = 0.5 mL draw = 50 units
CJC-1295 DAC 2 mg vial with 2 mL example
A 2 mg vial mixed with 2 mL gives 1 mg/mL. A 500 mcg dose is 0.5 mL (50 units) and a 1 mg dose is the full 1 mL (100 units), so the vial holds four 500 mcg doses or two 1 mg doses.
Weekly dosing means one vial can last two to four weeks, so the reconstituted beyond-use date matters as much as the dose count.
- 2 mg / 2 mL = 1 mg/mL
- 500 mcg / 1,000 mcg per mL = 0.5 mL = 50 U-100 units
- 1,000 mcg / 1,000 mcg per mL = 1.0 mL = 100 U-100 units
CJC-1295 with DAC 2 mg vial: units per dose (2 mL BAC water)
U-100 units to draw for each common CJC-1295 with DAC dose, by vial size, reconstituted with 2 mL of bacteriostatic water. Change the water volume in the calculator above to recompute for your own setup.
| Vial | Concentration | 500 mcg | 1 mg | 2 mg |
|---|---|---|---|---|
| 2 mg | 1 mg/mL | 50 u(0.5 mL) | 100 u(1 mL) | 200 u(2 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.
Frequently asked questions
What is the difference between CJC-1295 with DAC and without DAC?
What is a typical CJC-1295 DAC dosage?
How many units is 1 mg of CJC-1295 with DAC?
Is CJC-1295 approved as a medicine?
Primary sources
Background references for this calculator. PepSync does not make clinical claims; these citations support the educational context only.
- 1Pharmacokinetic and pharmacodynamic studies with CJC-1295, a long-acting growth hormone releasing peptidePubMed / Journal of Clinical Endocrinology & Metabolism · 2006
- 2Ipamorelin, the first selective growth hormone secretagoguePubMed / European Journal of Endocrinology · 2001