CJC-1295 (with DAC)

What Is CJC-1295 with DAC?

CJC-1295 with DAC (Drug Affinity Complex) is a long-acting synthetic analogue of Growth Hormone-Releasing Hormone (GHRH), engineered to provide sustained, stable elevation of natural growth hormone (GH) and IGF-1 with once-weekly dosing convenience.

The DAC modification is the key distinction between this compound and CJC-1295 without DAC. The Drug Affinity Complex enables the peptide to bind to serum albumin — the most abundant protein in blood plasma — creating an ultra-long half-life of approximately 6–8 days. This is roughly 30 times longer than CJC-1295 without DAC. Rather than producing a single sharp GH pulse, CJC-1295 DAC creates a prolonged, elevated GH baseline, elevating IGF-1 levels continuously throughout the week from a single weekly injection.

Like all GHRH analogues, CJC-1295 DAC preserves the body's natural pulsatile GH regulation — there is no receptor burnout, no abnormal hormone spikes, and no suppression of the body's own GH production pathways.

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How It Works — Mechanism of Action

1. GHRH Receptor Stimulation

CJC-1295 DAC binds to GHRH receptors on pituitary somatotroph cells, triggering natural GH synthesis and release. This is the same upstream mechanism as Sermorelin and CJC-1295 No DAC.

2. Albumin Binding — The DAC Advantage

The Drug Affinity Complex modification allows CJC-1295 to bind covalently to circulating albumin in the bloodstream. Because albumin has a half-life of ~19 days and is constantly recycled by the body, the peptide is protected from enzymatic degradation and cleared much more slowly — resulting in a 6–8 day active period from a single injection.

3. Sustained GH & IGF-1 Elevation

Clinical studies have demonstrated that a single dose of CJC-1295 DAC produces:

• GH increases of >200% sustained over multiple days
• IGF-1 elevation lasting 6–8 days

This sustained hormonal environment consistently improves fat metabolism, muscle repair, recovery, sleep quality, and tissue healing across the dosing interval.

4. Preserved Natural Feedback

Despite its long duration, CJC-1295 DAC still operates within the hypothalamic-pituitary feedback system — somatostatin continues to regulate GH output, preventing the dangerous supraphysiological levels associated with direct HGH injection.

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Research-Backed Benefits

Adipose Metabolism & Metabolic Support

• Increases basal metabolic rate through sustained GH-driven lipolysis
• Enhances breakdown of stored fat, particularly visceral fat
• Improves body composition over extended protocols
• Supports lean mass preservation during caloric deficits

Lean Mass & Musculoskeletal Repair Research

• Sustained IGF-1 elevation supports continuous muscle protein synthesis between injections
• Speeds recovery after training through improved collagen and connective tissue regeneration research
• Helps connective tissue regeneration research — joints, tendons, ligaments
• Preserves lean muscle during dieting or caloric restriction

Sleep, Mood & Cognitive Function

• Sustained GH elevation improves deep-wave sleep architecture
• Enhances REM sleep quality and duration
• Supports mental clarity, mood stability, and daytime energy
• Improvements in sleep architecture observed as an early finding in research subjects

Cellular Ageing & Lifespan Pathway Research

• Improves skin elasticity and collagen density through sustained IGF-1
• Supports mitochondrial health and cellular regenerative capacity
• Contributes to bone mineral density maintenance in ageing adults

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Dosing & Administration

Standard Dose: 2 mg once weekly Route: Subcutaneous injection Injection Sites: Abdomen, upper thigh, or glute — rotate weekly

Cycle

• 12 weeks on → 4 weeks off
• Safe to repeat for multiple cycles per year
• IGF-1 levels should be monitored during extended use

Reconstitution

• Add bacteriostatic water to lyophilised powder
• Swirl gently — never shake
• Refrigerate at 2–8°C and use within 28 days
• Discard if solution is cloudy or contains visible particles

CJC-1295 DAC vs CJC-1295 No DAC — Which to Choose?

• CJC-1295 DAC → once-weekly dosing, sustained GH baseline, better for convenience and consistent IGF-1 elevation. Preferred for cellular ageing research, body recomposition research, and general GH optimisation protocols.
• CJC-1295 No DAC → short-acting, sharp GH pulses, best used with Ipamorelin for timed pulsatile release. Preferred when precise timing is important (e.g. around sleep or training).

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Side Effects & Safety

CJC-1295 DAC is well-tolerated at standard doses, with a side effect profile consistent with other GHRH analogues. The sustained GH elevation means some GH-related effects may be more persistent than with short-acting compounds.

Commonly reported (generally mild)

• Injection site redness, minor swelling — resolves with site rotation
• Mild water retention or bloating, particularly in the first weeks — usually self-limiting
• Mild headache as GH/IGF-1 levels adjust
• Mild joint aches or stiffness at higher IGF-1 levels — reduce dose if persistent
• Mild flushing or warmth after injection

Important safety considerations

• IGF-1 monitoring — sustained IGF-1 elevation requires periodic blood monitoring to ensure levels remain within physiological range. Excessively elevated IGF-1 over extended periods is associated with insulin resistance and, theoretically, increased cancer risk
• Cancer history — avoid without explicit oncology consultation
• Hypothyroidism — uncontrolled thyroid conditions can blunt response; address thyroid status before commencing
• Pregnancy and breastfeeding — avoid use
• Carpal tunnel-like symptoms — if tingling or numbness in the hands develops, reduce dose and consult a physician; this is a known GH-related effect at supraphysiological levels

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Synergy Stacks

CJC-1295 DAC + Ipamorelin (Most Popular)

The most widely used GH optimisation combination. CJC-1295 DAC provides sustained background GH elevation (once weekly); Ipamorelin adds clean daily pulsatile GH bursts. Together they maximise GH output, body recomposition, recovery quality, and sleep depth without cortisol or prolactin elevation.

CJC-1295 DAC + Retatrutide

A powerful metabolic transformation stack — GLP-1/GIP/glucagon triple agonism combined with sustained GH elevation. Targets visceral fat from multiple angles while preserving lean mass.

CJC-1295 DAC + BPC-157 + TB-500

GH optimisation paired with the strongest tissue healing peptide combination. Excellent for athletes requiring both systemic recovery support and active injury management.

CJC-1295 DAC + Epitalon + NAD+

Premium investigational research protocol targeting cellular ageing pathways. Combines sustained GH/IGF-1 optimisation with telomerase activation and cellular energy restoration.