CJC-1295 with DAC vs Human Growth Hormone (HGH)
Long-acting growth hormone releaser that works around the clock to boost your body's natural GH production with just one or two injections per week.
The master hormone that acts as your body's repair crew—building lean muscle, burning stubborn fat, strengthening bones, and helping you recover like you did in your younger years [2][3].
Written by Michael Carroll — Owner, Director of Research · Reviewed by the Peptide Initiative Research Team · Editorial standards
Quick comparison
Dose range
CJC-1295 with DAC
2–2 mg
Human Growth Hormone (HGH)
0.1–0.2 mg/day
Frequency
CJC-1295 with DAC
Twice weekly
Human Growth Hormone (HGH)
Once daily
Administration
CJC-1295 with DAC
Subcutaneous injection
Human Growth Hormone (HGH)
Subcutaneous injection
Cycle length
CJC-1295 with DAC
8-12 weeks
Human Growth Hormone (HGH)
12+ weeks
Onset speed
CJC-1295 with DAC
Moderate (1-2 weeks)
Human Growth Hormone (HGH)
Gradual (3-4 weeks)
Evidence level
CJC-1295 with DAC
Moderate human trials (Phase 1-2)
Human Growth Hormone (HGH)
Strong human trials (Phase 3 or FDA approved)
Benefit ratings
GH Elevation
Convenience
Recovery Support
Body Composition
Recovery & Healing
Anti-Aging Effects
Compound specifications
CJC-1295 with DAC
Molecular formula
C165H269N47O46
Molecular weight
3647.28 g/mol
Half-life
6-8 days
Bioavailability
~100% (subcutaneous)
CAS number
863288-34-0
Human Growth Hormone (HGH)
Molecular formula
C990H1529N263O299S7
Molecular weight
22,124 Da (22.124 kDa)
Half-life
2-4 hours (endogenous), varies by formulation for synthetic
Bioavailability
70-90% (subcutaneous injection)
CAS number
12629-01-5
Dosing compared
CJC-1295 with DAC
Subcutaneous
1 mg (1000 mcg)
Once weekly · 2-4 weeks
A starting dose used in practice. The DAC version is long-acting (about a 6-8 day half-life), so weekly dosing keeps growth hormone and IGF-1 raised. In the Phase 1 trial a single dose raised GH for 6+ days and IGF-1 for up to 11 days. [2]
2 mg (2000 mcg)
Once weekly (or split twice weekly) · 8-12 weeks
The common maintenance dose, roughly in line with the 30-60 mcg/kg weekly range studied in the Phase 1 trial. [1][2] In the ascending-dose trials, single injections raised mean GH 2- to 10-fold for six or more days and IGF-I 1.5- to 3-fold for 9-11 days; 30 and 60 µg/kg doses were the best tolerated [2].
2 mg per dose
Twice weekly · 8-12 weeks
A higher total weekly amount split into two doses, used by experienced users; near the top of the 30-60 mcg/kg weekly range from the clinical study. [2]
Human Growth Hormone (HGH)
Subcutaneous
First 1-2 months before titration
0.15-0.30 mg/day (approx. 0.2 mg/day)
Once daily · First 1-2 months before titration
FDA-labeled non-weight-based starting dose for adult growth hormone deficiency (Genotropin) [6]. Lower starting doses and smaller increments are advised for older patients [6].
Adjusted every 1-2 months
Titrate by 0.1-0.2 mg/day to target (commonly 0.2-0.6 mg/day)
Once daily · Adjusted every 1-2 months
Dose titrated every 1-2 months to clinical response and serum IGF-1 per FDA label [6].
Weeks 4-8
Not more than 0.04 mg/kg/week initially, up to 0.08 mg/kg/week
Divided into 6-7 daily injections · Titrated at 4-8 week intervals
FDA-labeled weight-based regimen ceiling for adult GH deficiency (Genotropin) [6].
Best suited for
CJC-1295 with DAC
Growth Hormone Optimization
CJC-1295 with DAC excels at providing a sustained, steady elevation of growth hormone levels. Unlike shorter-acting peptides that create brief spikes, the DAC modification keeps GH elevated for days, mimicking a more youthful hormone profile.
Muscle Building and Recovery
By increasing both GH and IGF-1 levels, this peptide supports protein synthesis and muscle repair. Users often notice improved recovery between workouts and better ability to build and maintain lean muscle mass.
Anti-Aging and Longevity
Growth hormone naturally declines with age, contributing to many signs of aging. CJC-1295 with DAC helps restore more youthful GH levels, potentially supporting better skin quality, energy levels, and overall vitality.
Body Composition Improvement
The combination of increased GH and IGF-1 promotes fat metabolism while preserving muscle tissue. Many users experience gradual fat loss, particularly in stubborn areas, while maintaining or building lean mass.
Convenient Weekly Dosing
Unlike peptides requiring daily or twice-daily injections, the extended half-life of CJC-1295 with DAC means just one or two injections per week provide continuous benefits. Ideal for those who want results without daily protocols.
Human Growth Hormone (HGH)
Anti-Aging and Longevity Seekers
HGH naturally declines as you age—by 60, you may have only 20% of what you had at 20. Replacement therapy can help restore youthful energy, improve skin quality, maintain muscle mass, and support overall vitality [7]. Think of it as giving your body back the building blocks it's been missing.
Body Recomposition Goals
HGH is one of the few compounds that helps you build lean muscle while simultaneously burning fat [2]. It enhances protein synthesis for muscle growth while mobilizing fat stores for energy. The result? A leaner, more muscular physique—especially when combined with proper training and nutrition.
Recovery and Healing
Whether you're recovering from surgery, a sports injury, or just intense training, HGH accelerates tissue repair. It promotes collagen synthesis, speeds wound healing, and helps tendons and ligaments recover faster [10][11]. Athletes and fitness enthusiasts particularly value this benefit.
Sleep Quality Improvement
Many HGH users report significantly better sleep—falling asleep faster, sleeping deeper, and waking up feeling more refreshed. This makes sense because growth hormone is naturally released in pulses during deep sleep [9]. Better sleep means better recovery, mood, and cognitive function.
Side effects
CJC-1295 with DAC
Common
- Injection site reactions
- Water retention
- Flushing
- Tingling sensation
Uncommon
- Headaches
- Fatigue or lethargy
- Joint discomfort
Serious
- Carpal tunnel symptoms
- Blood glucose elevation
Human Growth Hormone (HGH)
Common
- Water retention and swelling
- Joint and muscle pain
- Carpal tunnel symptoms
- Headaches
Uncommon
- Elevated blood sugar
- Gynecomastia (in men)
Serious
- Intracranial hypertension
Safety & evidence
CJC-1295 with DAC
Evidence level
Moderate human trials (Phase 1-2)
FDA status
Research compound
Safety overview
CJC-1295 with DAC was evaluated in Phase 1-2 human clinical trials where it demonstrated a generally favorable safety profile. The most common adverse events were mild injection site reactions including temporary pain, swelling, and redness. No serious adverse events were reported in the published clinical studies. The compound was being developed for HIV-associated lipodystrophy before the program was discontinued.
Contraindications
- Active cancer or history of malignancy
- Pregnancy or breastfeeding
- Pituitary tumors or disorders
- Diabetic retinopathy
- Uncontrolled diabetes
Human Growth Hormone (HGH)
Evidence level
Strong human trials (Phase 3 or FDA approved)
FDA status
FDA approved for other use
Safety overview
Recombinant human growth hormone has been FDA-approved since 1985 and has extensive safety data from decades of clinical use [14]. When used at appropriate replacement doses, it has a well-established safety profile [2]. Most side effects are dose-dependent and reversible by reducing the dose [6]. Long-term monitoring of blood sugar, IGF-1 levels, and overall health markers is recommended.
Contraindications
- Active cancer or history of cancer [6][17]
- Diabetic retinopathy (eye damage from diabetes) [6]
- Severe respiratory illness or breathing problems [6]
- Known hypersensitivity to growth hormone or any excipients [6]
- Closed epiphyses in children when used for growth [6]
Which is right for you?
Choose CJC-1295 with DAC if...
- Boosting natural growth hormone production
- Building lean muscle mass
- Improving body composition
- Anti-aging and longevity
Choose Human Growth Hormone (HGH) if...
- Body recomposition (building muscle while losing fat)
- Anti-aging and longevity
- Recovery from injury or surgery
- Improved sleep quality