How the CJC-1295 calculator works
Lyophilized (freeze-dried) powder in a sealed vial, labelled in milligrams. The quick-fill buttons in the calculator are the vial sizes CJC-1295 is commonly labelled in (2 mg and 5 mg). If yours is different, type it in.
Amounts of CJC-1295 are usually written in micrograms (mcg), so the calculator opens in mcg.
Check which form the label states. The two differ slightly in molecular weight, but the arithmetic on this page is by weight and is identical for both. CJC-1295 is also sold blended with ipamorelin, which needs the separate blend calculator.
For a field-by-field walkthrough and a guide to syringe types, see the main peptide calculator.
CJC-1295 concentration table
Each labelled vial size at the same three round water volumes used across this site. It shows how the arithmetic behaves and is not a suggestion of what to use.
| Vial | Water added | Concentration | Each mark holds |
|---|---|---|---|
| 2 mg vial | 1 mL | 2 mg/mL | 20 mcg per unit |
| 2 mg vial | 2 mL | 1 mg/mL | 10 mcg per unit |
| 2 mg vial | 3 mL | 0.67 mg/mL | 6.7 mcg per unit |
| 5 mg vial | 1 mL | 5 mg/mL | 50 mcg per unit |
| 5 mg vial | 2 mL | 2.5 mg/mL | 25 mcg per unit |
| 5 mg vial | 3 mL | 1.67 mg/mL | 16.7 mcg per unit |
Every row for a given vial holds the same total. To compare volumes for a specific reading, use the BAC water calculator.
The formula, step by step
The “Try example numbers” button uses one fixed rule on every page: the smallest labelled vial, 2 mL of water, and whatever amount lands on the 10-unit mark. The amount is a by-product of that rule and not a typical or suggested CJC-1295 dose.
- Concentration: 2 mg ÷ 2 mL = 1 mg/mL.
- The 10-unit mark is 10 ÷ 100 = 0.1 mL, which holds 0.1 × 1 = 0.1 mg (100 mcg).
- Run it forwards to check: 0.1 mg ÷ 1 mg/mL = 0.1 mL, and 0.1 × 100 = 10 units.
CJC-1295: general reference
General educational reference for research purposes only. None of it is a recommendation, none of it is medical advice, and none of it is used by the calculator, which works only on the numbers you enter.
CJC-1295 is a synthetic analog of growth hormone-releasing hormone (GHRH). The name covers two different products. CJC-1295 with DAC carries a chemical group, the Drug Affinity Complex, that binds it to albumin in the blood. CJC-1295 without DAC, also called Modified GRF 1-29, is the same peptide without that group.
The form with DAC was developed by the Canadian company ConjuChem. In a 2006 study in healthy adults its half-life was estimated at about 6 to 8 days, which is unusually long for a peptide and is the result of the albumin binding.
The form without DAC has no comparable study behind it. It is generally described as far shorter-lived, but that description does not come from a published human pharmacokinetic study.
Neither form has been approved as a medicine.
- Class
- GHRH analog, sold in two different forms
- Group
- Growth hormone and IGF-1 axis
- Also known as
- CJC-1295 with DAC, Modified GRF 1-29 (CJC-1295 without DAC)
- Molecular weight
- About 3,647 Da with DAC, and about 3,368 Da without
- Half-life
- About 6 to 8 days with DAC. Teichman et al. (2006) estimated a half-life of 5.8 to 8.1 days for CJC-1295 with DAC in healthy adults. No comparable published human study exists for the form without DAC, which is generally described as far shorter-lived.
- Regulatory status
- Not approved as a medicine. Neither form of CJC-1295 is approved as a medicine by the FDA, the EMA or any other major regulator. Its position in US pharmacy compounding has changed since 2023 and remains under FDA review, so check the FDA’s current bulk drug substances lists for the present status.
- Status in sport
- Prohibited at all times under the WADA Prohibited List (section S2), where CJC-1295 is named among the GHRH analogues.
- Labelled vial sizes
- 2 mg and 5 mg
Arithmetic slips to watch for with CJC-1295
With DAC or without: read the label
The two forms are different products with very different half-lives, and sellers do not always make the distinction obvious. The calculator cannot tell them apart and does not need to: the concentration arithmetic depends only on the milligrams and the water.
2 mg and 5 mg vials are not interchangeable
With 2 mL of water, a 2 mg vial is 1 mg/mL, or 10 mcg per unit on a U-100 syringe. A 5 mg vial is 2.5 mg/mL, or 25 mcg per unit. The same unit count holds two and a half times as much from the larger vial.
A blend vial is a different calculation
In a vial that also contains ipamorelin, the label total is the sum of both compounds. Entering that total here would overstate the CJC-1295 concentration. Use the blend calculator for those vials.
What this page does not do
The calculator performs mathematical conversions only. It does not recommend, suggest or verify any CJC-1295 dose or schedule, it does not say how much water to add, and it does not say what CJC-1295 is for, whether it is safe, or whether it is legal where you live. It is not medical advice, diagnosis or treatment, and Peptrack does not sell, supply or endorse any substance.
Always confirm measurements with a licensed healthcare provider or pharmacist. See the full disclaimer.
Sources
- Teichman et al. (2006), CJC-1295, a long-acting analog of GHRH, in healthy adults, Journal of Clinical Endocrinology & Metabolism
- WADA Prohibited List
- FDA: bulk drug substances used in compounding under section 503A
Facts last checked: September 2026. Regulatory status changes, so check the regulator’s own pages for the current position.
