CJC-1295 vs Melanotan II
A detailed comparison to help you understand the differences and choose the right peptide for your research goals.
CJC-1295
CJC-1295 is a synthetic analog of growth hormone-releasing hormone (GHRH) that stimulates the pituitary gland to produce more growth hormone.
Full details →Melanotan II
Melanotan II is a synthetic peptide analog of α-MSH with broader receptor activity than Melanotan I. It produces tanning effects and has notable effects on sexual function and appetite suppression.
Full details →Side-by-Side Comparison
| Aspect | CJC-1295 | Melanotan II |
|---|---|---|
| Dose Range | 1 mg–2 mg | 250 mcg–1 mg |
| Frequency | Less than daily | 1x daily |
| Cycle Length | 8–12 weeks | 1–2 weeks |
| Route | subcutaneous | subcutaneous |
| Mechanism | CJC-1295 binds to GHRH receptors in the pituitary, triggering increased production and release of growth hormone. The DAC (Drug Affinity Complex) version extends half-life significantly. | Non-selective melanocortin receptor agonist affecting MC1R (tanning), MC3R and MC4R (sexual function and appetite). This broader activity explains its multiple effects beyond tanning. |
| Typical Dosage | CJC-1295 DAC: 1-2mg weekly. CJC-1295 no DAC (Mod GRF 1-29): 100-300mcg 2-3 times daily. | Typical protocols: 0.25-0.5mg daily during loading phase for 1-2 weeks, then 0.5-1mg before UV exposure for maintenance. Start low to assess tolerance. |
| Administration | Subcutaneous injection, often combined with a GHRP like Ipamorelin for synergistic effects. Best administered before sleep or fasted. | Subcutaneous injection. Usually combined with UV exposure for tanning effects. Nasal spray formulations exist but have lower bioavailability. |
| Side Effects | Water retention, tingling in extremities, potential increase in cortisol and prolactin levels. | Nausea (common initially), facial flushing, spontaneous erections, increased libido, appetite suppression, and mole darkening. |
| Best For |
What They Have in Common
CJC-1295, Melanotan II are both commonly used for:
Key Differences
Unique to CJC-1295:
Unique to Melanotan II:
Which Has Stronger Evidence?
- Fat Loss: CJC-1295 has stronger research support.
| Goal | CJC-1295 | Melanotan II |
|---|---|---|
| Fat Loss | high | low |
Key Studies
CJC-1295
- A method for confirming CJC-1295 abuse in equine plasma samples by LC-MS/MS.
Drug testing and analysis, 2019
- An immuno polymerase chain reaction screen for the detection of CJC-1295 and other growth-hormone-releasing hormone analogs in equine plasma.
Drug testing and analysis, 2019
- Netnography of Female Use of the Synthetic Growth Hormone CJC-1295: Pulses and Potions.
Substance use & misuse, 2016
Melanotan II
- Melanotan II nasal spray: a possible risk factor for oral mucosal malignant melanoma?
International journal of oral and maxillofacial surgery, 2025
- Melanotan II User Experience: A Qualitative Study of Online Discussion Forums.
Dermatology (Basel, Switzerland), 2021
- Melanotan II, a melanocortin agonist, partially rescues the impaired thermogenic capacity of pituitary adenylate cyclase-activating polypeptide deficient mice.
Experimental physiology, 2021
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