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CJC‑1295 – No DAC, also known as Modified GRF (1‑29), is a synthetic 29-amino acid analogue of endogenous growth hormone–releasing hormone (GHRH). It was developed to resist enzymatic degradation and mimic the physiological pulsatile release of growth hormone in laboratory research [1][2].
This peptide retains the first 29 amino acids of endogenous GHRH but with four strategic amino acid substitutions—most notably D-Ala at position 2, and substitutions at positions 8, 15, and 27—to enhance stability [3]. The sequence (Tyr-D-Ala-Asp-Ala-Ile-Phe-Thr-Gln-Ser‑Tyr‑Arg‑Lys‑Val‑Leu-Ala-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Leu-Ser‑Arg‑NH₂) exhibits a half-life around 30 minutes, supporting its use in repeated or pulsatile dosing regimens in research applications [3].
Acts on GHRH receptors at the anterior pituitary, inducing pulsatile growth hormone release in animal and human research models, similar to endogenous GHRH [2].
Its ~30-minute half-life avoids prolonged GH elevation, enabling controlled, repeatable research dosing paradigms [2].
Preclinical and early human investigations link its use with enhanced lean tissue synthesis, improved metabolic markers, accelerated tissue repair, and modulation of bone turnover, reflecting effects typically mediated by endogenous GH [2][4].
Frequently combined with growth hormone secretagogues (e.g., GHRPs) to mimic physiologic GH pulses, optimize metabolic endpoints, and study recovery dynamics in lab models [4].
Studies suggest predictable endocrine responses with minimal off-target effects, making it suitable for controlled experimental protocols [2][4].
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I decided to try something new with Iron Peptides, and it has already been very beneficial. Since starting, I’ve noticed many positive effects. I feel motivated to continue, and I’m confident I’ve found the right company to trust on my personal journey—Iron Peptides.
The products, services and information is exceptional
Fist time trying peptides to see what all the hype was about. And. I AM HOOKED! Have never felt. Better. 5 months after my neck surgery and I feel amazing. Recovery was easy and I have all my strength back!!
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