Is Mod GRF 1-29 the same as CJC-1295 without DAC?

Yes. Modified GRF 1-29 (also written as Mod GRF 1-29) is the common synonym for CJC-1295 without DAC. Both refer to the 4-substitution GHRH analog without the albumin-binding DAC modification.

How often do you inject CJC-1295 with DAC?

CJC-1295 with DAC is typically injected 1-2 times per week subcutaneously due to its 6-8 day half-life. Research protocols commonly use 1-2mg per injection.

How often do you inject CJC-1295 without DAC?

CJC-1295 without DAC is typically injected 2-3 times daily or at minimum once before bed, at doses of 100-300 mcg. For research use only.

Does CJC-1295 with DAC cause GH bleed?

Yes — "GH bleed" refers to the continuous, non-pulsatile GH elevation caused by the persistent albumin-bound DAC variant. Some researchers consider this less physiological than natural pulsatile GH release.

Which form is better for fat loss?

CJC-1295 with DAC may produce marginally greater fat loss due to sustained IGF-1 and GH-driven lipolysis. However, pairing without-DAC with Ipamorelin can match this with better pulse control.

What side effects differ between DAC and no-DAC?

CJC-1295 with DAC tends to cause more persistent water retention and occasional tingling due to sustained IGF-1. Without DAC, side effects are shorter-lived following each injection.

Is CJC-1295 with DAC stronger than without?

In terms of total IGF-1 area under the curve, yes — with DAC produces greater cumulative IGF-1 elevation. Without DAC produces sharper, more acute GH peaks but a lower 24-hour average.

CJC-1295 vs CJC-1295 (Variant): Dosing, Half-Life, Side Effects + Which to Choose (2026) | PeptiDex

Quick Verdict

CJC-1295 without DAC mimics natural pulsatile GH (best stacked with Ipamorelin). CJC-1295 with DAC provides sustained 6-8 day IGF-1 elevation via albumin binding — ideal for convenience and maximum body composition impact.

Side-by-Side Analysis

Dimension	CJC-1295	CJC-1295 (With DAC)
Mechanism	Stimulates prolonged GH and IGF-1 release by mimicking the body's natural GHRH signal to the pituitary gland.	Stimulates prolonged GH and IGF-1 release by mimicking the body's natural GHRH signal to the pituitary gland.
Primary Benefits	Muscle growth, fat loss, recovery	Muscle growth, fat loss, recovery
Typical Dose	1000–1000mcg	1000–1000mcg
Route	SubQ	SubQ
Frequency	3x/week	3x/week
Half-Life	168 hours	168 hours
FDA Status	Approved	Approved
Evidence Grade	moderate	moderate
Key Studies	20+ indexed	20+ indexed
Lowest Price	$59.99 / 10mg via Amino Club	$59.99 / 10mg via Amino Club

Which one should you choose?

CJC-1295 without DAC (Mod GRF 1-29) is better for physiological pulsatile GH; CJC-1295 with DAC is better for maximal, sustained IGF-1 elevation with minimal injections. The DAC modification allows albumin binding, extending half-life from ~30 minutes to 6-8 days. Without DAC, the peptide is cleared quickly, creating a sharp GH pulse similar to Sermorelin. Choose without DAC when stacking with Ipamorelin for synergistic acute pulses. Choose with DAC for a set-and-forget weekly injection convenience.

Who Should Choose CJC-1295?

Choose CJC-1295 with DAC if you:

Want maximum IGF-1 elevation with 1-2 injections per week
Are prioritizing body composition and recovery over naturalness
Do not plan to stack with a GHRP (stand-alone use)
Are researching sustained anabolic signaling

Who Should Choose CJC-1295 (With DAC)?

Choose CJC-1295 without DAC (Mod GRF 1-29) if you:

Are stacking with Ipamorelin for synergistic GH pulses
Want a more physiological, pulsatile GH release pattern
Prefer injecting pre-bed to leverage nocturnal GH surge
Are newer to peptide research and want more control

Can you stack CJC-1295 + CJC-1295 (variant)?

CJC-1295 without DAC + Ipamorelin is the gold-standard stack because both compounds create acute, synergistic GH pulses together. CJC-1295 with DAC + Ipamorelin is also used but the continuous DAC background can blunt the pulsatile benefits of Ipamorelin slightly.

Vendor Pricing

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CJC-1295

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Frequently Asked Questions

DAC stands for Drug Affinity Complex — a reactive maleimidopropionic acid group that covalently binds to serum albumin after injection, dramatically extending the half-life from ~30 minutes to 6-8 days.

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Research Use Only — Not Medical Advice

This comparison is provided for educational and research purposes only. It does not constitute medical, prescribing, or treatment advice. Clinical data cited here is sourced from published peer-reviewed trials and FDA labels. Consult a qualified healthcare professional before making any decisions about medications or research compounds. PeptiDex is an informational resource and does not sell pharmaceutical products.