CJC-1295 Dosage Guide: Reconstitution, Injection Volume Tables, and Protocol Guide
Practical guide to CJC-1295 (Mod GRF 1-29 and with DAC) reconstitution, injection volume calculation, and standard research dosing protocols for GH axis stimulation.
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CJC-1295 refers to two related but pharmacologically distinct GHRH analogues: CJC-1295 Without DAC (Mod GRF 1-29) and CJC-1295 With DAC. They differ significantly in half-life and dosing frequency. This guide covers both.
Understanding the Two CJC-1295 Forms
| Property | Mod GRF 1-29 (No DAC) | CJC-1295 with DAC |
|---|---|---|
| Half-life | 30–60 minutes | 6–8 days |
| Dosing frequency | 1–3x daily | Once weekly |
| GH pattern | Pulsatile | Sustained |
| Typical vial size | 2–5 mg | 2–5 mg |
What Vials Typically Come In
- Mod GRF 1-29: 2 mg, 5 mg vials
- CJC-1295 with DAC: 2 mg, 5 mg vials
Reconstitution (Both Forms)
Standard reconstitution for a 2 mg vial:
1. Swab the vial stopper with alcohol; allow to dry
2. Draw 1–2 mL bacteriostatic water
3. Inject water down the vial wall slowly
4. Swirl gently — no shaking
5. Wait 2–3 minutes for complete dissolution
Concentration examples:
- 2 mg + 1 mL BW → 2000 mcg/mL
- 2 mg + 2 mL BW → 1000 mcg/mL
- 5 mg + 2 mL BW → 2500 mcg/mL
Standard Research Dosage Ranges
Mod GRF 1-29 (CJC-1295 Without DAC)
| Protocol | Dose | Frequency |
|---|---|---|
| Standard combination | 100–200 mcg | 1–3x daily |
| Combined with GHS | 100–200 mcg | With each GHS injection |
| Maximum GH output | 200–300 mcg | 2–3x daily |
CJC-1295 with DAC
| Protocol | Dose | Frequency |
|---|---|---|
| Standard weekly | 1–2 mg | Once weekly |
| Extended cycle | 2 mg | Once every 10–14 days |
Injection Volume Table
Mod GRF 1-29 at 2000 mcg/mL (2 mg in 1 mL BW):
| Target Dose | Volume to Inject |
|---|---|
| 100 mcg | 0.05 mL (5 units) |
| 150 mcg | 0.075 mL (7.5 units) |
| 200 mcg | 0.10 mL (10 units) |
| 300 mcg | 0.15 mL (15 units) |
CJC-1295 DAC at 2000 mcg/mL (2 mg in 1 mL BW):
| Target Dose | Volume to Inject |
|---|---|
| 500 mcg | 0.25 mL (25 units) |
| 1 mg (1000 mcg) | 0.50 mL (50 units) |
| 2 mg (2000 mcg) | 1.00 mL (100 units) |
Use the Dose Calculator to compute exact volumes for your specific vial and target dose.
Timing and Cycle Length
Mod GRF 1-29:
- Administer with ipamorelin or GHRP simultaneously, 1–3x daily
- Best timing: bedtime (fasted); pre-workout optional
CJC-1295 with DAC:
- Inject once weekly; timing is flexible given 6–8 day half-life
- Cycle length: 12–16 weeks; 3–4 month protocols common
Storage
- Lyophilised vials: -20°C
- After reconstitution: 2–8°C; use within 28 days
Calculate Your Exact Injection Volume
Use our free dose calculator — enter any vial size and target dose to get the precise volume to draw up.
About the Author
KnowYourPeptide Research Team
KnowYourPeptide Research Team
Content produced by the KnowYourPeptide research and editorial team. All articles are written from peer-reviewed primary literature and reviewed for scientific accuracy by credentialed researchers and a board-certified physician before publication.
Meet the full editorial teamMedically Reviewed by Dr. Amanda Reid, MD
This article has been reviewed by Dr. Amanda Reid, MD (Board-Certified Internal Medicine), Know Your Peptide Medical Advisor, for scientific accuracy, safety information, and appropriate clinical context. Learn about our review process.