CJC-1295 vs Retatrutide
Side-by-Side Comparison
| Attribute | Cjc 1295 | Retatrutide |
|---|---|---|
| Category | Growth Hormone Secretagogue | Metabolic / Triple Agonist |
| Mechanism | CJC-1295 binds to GHRH receptors (GHRHR) on pituitary somatotroph cells, activating intracellular cAMP signaling to stimulate both the transcription of the GH gene and pulsatile release of endogenous... | Retatrutide simultaneously activates three receptors: GLP-1 (reduces appetite, slows gastric emptying, improves insulin secretion), GIP (enhances insulin sensitivity, glucose control), and glucagon... |
| Evidence Rating | D — Preclinical | B — Phase III / NDA Filed |
| Clinical Status | Research-only / Not approved for human use | Phase 3 clinical trials (Eli Lilly TRIUMPH program) |
| Safety Profile | Common: transient flushing/"head rush" within 5-10 minutes post-injection — hallmark of a potent injection, harmless and brief; Self-reported: flu-like symptoms, headaches, irritability, anxiety, nausea, hives (mild and transient) | GI side effects (dose-related, 13-63% across dose groups): nausea, vomiting, diarrhea, constipation; mostly mild to moderate; GI events partially mitigated with lower starting dose (2 mg vs 4 mg initial dose) |
| Route | Subcutaneous | Subcutaneous (clinical trial formulation only) |
| Dose Range | No DAC: 100 mcg before bed daily; DAC: 1–2 mg 2–3x weekly | Phase 2 tested 1, 4, 8, 12 mg weekly SC; optimal dose being determined in Phase 3 |
| Frequency | Once daily (no DAC) or 2–3 times weekly (with DAC) | Once weekly |
| Molecular Weight | No DAC: ~3367.9 g/mol; With DAC: ~3647.3 g/mol | N/A |
| Half-Life | No DAC (mod GRF 1-29): ~30 min; With DAC: ~8 days | ~6 days (allows once-weekly dosing) |
Overview
CJC-1295 and Retatrutide are both research peptides studied across multiple applications. This comparison examines their mechanisms, evidence base, dosing protocols, and safety profiles to help researchers understand the key differences and overlaps.
CJC-1295 — Mechanism & Evidence
CJC-1295 is a synthetic analogue of growth hormone-releasing hormone (GHRH) originally developed by ConjuChem Technologies for HIV-associated lipodystrophy. It exists in two forms: with DAC (Drug Affinity Complex) for extended half-life of 5.8-8.1 days, and without DAC (Mod GRF 1-29) for shorter, pulsatile release with a half-life of approximately 30 minutes. Two 2006 randomized, placebo-controlled, double-blind clinical trials (Teichman et al.) demonstrated dose-dependent GH increases of 2-10 fold and IGF-1 increases of 1.5-3 fold in healthy adults aged 21-61. The No DAC version is generally considered the safer choice due to its physiological pulsatile pattern.
Key claims: Increases growth hormone and IGF-1; Improves body composition; Promotes deep sleep.
Retatrutide — Mechanism & Evidence
Retatrutide is a first-in-class investigational triple hormone receptor agonist (GIP, GLP-1, and glucagon) developed by Eli Lilly. In the Phase 2 trial (Jastreboff et al., NEJM 2023, n=338), the 12 mg dose achieved 24.2% mean body weight reduction at 48 weeks, with 100% of participants achieving at least 5% weight loss. Multiple Phase 3 TRIUMPH trials are ongoing, with TRIUMPH-4 (Dec 2025) reporting average loss up to 71.2 lbs with osteoarthritis pain relief. Expected FDA approval is 2027-2028.
Key claims: Unprecedented weight loss in Phase 2; Phase 3 confirms efficacy with osteoarthritis benefit; Improves glycemic control in type 2 diabetes.
Shared Research Applications
These peptides target different research areas. CJC-1295 focuses on Anti-Aging, Body Composition, while Retatrutide targets Weight Management, Metabolic Health.
Safety Considerations
CJC-1295: Common: transient flushing/"head rush" within 5-10 minutes post-injection — hallmark of a potent injection, harmless and brief Self-reported: flu-like symptoms, headaches, irritability, anxiety, nausea, hives (mild and transient) Water retention and edema (dose-dependent; elevated GH causes sodium/water retention via kidneys)
Retatrutide: GI side effects (dose-related, 13-63% across dose groups): nausea, vomiting, diarrhea, constipation; mostly mild to moderate GI events partially mitigated with lower starting dose (2 mg vs 4 mg initial dose) Dose-dependent heart rate increases peaking at 24 weeks, declining thereafter
Related Products
Related Research News
Retatrutide Clinical Trial Results: Phase III TRIUMPH Data Shows Significant Weight Loss
Early reports from the Phase III TRIUMPH-1 trial suggest retatrutide, a novel triple agonist, has delivered substantial weight loss outcomes. These retatrutide clinical trial results indicate a potential shift in obesity treatment research, though full data analysis is pending.
Retatrutide Phase III TRIUMPH-1 Results: Unprecedented Weight Loss Reported at ADA26
Early reports from the American Diabetes Association 2026 meeting suggest retatrutide delivered unprecedented weight loss in the Phase III TRIUMPH-1 trial. Researchers and industry professionals are closely watching these retatrutide clinical trial results for implications in obesity and metabolic disease treatment.
Retatrutide Monthly Research Cost in Australia Breakdown
Researching Retatrutide (LY3437943), the most advanced triple GLP-1/GIP/glucagon receptor agonist, involves costs that vary by vial size, dose, and frequency. In Australia, a 10mg vial costs $129.99 AUD ($13.00/mg), while a 20mg vial is $199.99 AUD ($10.00/mg). Supplies like bacteriostatic water and needles add to monthly expenses, with planning around a 4-week reconstituted stability window essential to minimize waste.