CJC-1295 (no DAC)

experimental

Also known as: Mod GRF 1-29, Modified GRF (1-29)

**Mechanism of Action** CJC-1295 (without DAC) is a synthetic tetrasubstituted analog of growth hormone-releasing hormone (GHRH) comprising amino acids 1–29. Its structural modifications (e.g., substitution at positions 2, 8, 15, and 27) confer resistance to dipeptidyl peptidase IV (DPP-IV) degradation, extending its half-life relative to endogenous GHRH. The peptide binds to pituitary GHRH receptors, stimulating pulsatile growth hormone (GH) secretion in a manner that preserves the natural ultradian rhythm. Unlike the DAC-conjugated variant, this form lacks a drug affinity complex, resulting in a shorter duration of action and a more transient GH pulse. **Key Research Findings** Preclinical and early-phase studies demonstrate that CJC-1295 (no DAC) dose-dependently elevates GH and insulin-like growth factor 1 (IGF-1) levels without abolishing endogenous GH pulsatility. In rodent models, repeated administration increased lean body mass and bone density, with minimal desensitization of the somatotropic axis. Human trials (Phase I/II) reported transient increases in GH and IGF-1 over 2–4 hours post-injection, with mild side effects including flushing and injection-site reactions. No significant alterations in glucose homeostasis or cortisol were observed in short-term studies. However, long-term safety data remain absent. **Clinical Relevance** CJC-1295 (no DAC) is classified as an experimental peptide with no approved therapeutic indications. Its potential applications—such as treating GH deficiency, sarcopenia, or frailty—are speculative and require rigorous clinical validation. Due to its GH-releasing properties, it is subject to regulatory restrictions in many jurisdictions. **For research purposes only — not medical advice.**

Key data

Category
Growth Hormone Peptides
Administration
subcutaneous
Research status
experimental
References
36
Tags
ghrh-analog, gh-secretagogue

Research & studies

Cationic exchange SPE combined with triple quadrupole UHPLC-MS/MS for detection of GHRHs in urine samples
Analytical biochemistry · 2023 · PubMed

Method detects tesamorelin, CJC-1295, sermorelin (GRF 1-29), sermorelin (3-29)-NH2, and somatorelin.; LOD of 0.2 ng/mL and LOQ of 0.6 ng/mL achieved.; Linearity established from 0.1 ng/mL to 1.2 ng/mL.; Validated per WADA criteria for selectivity, LOD, carryover, reliability, stability, and recovery.

Comparison of magnetic bead surface functionalities for the immunopurification of growth hormone-releasing hormones prior to liquid chromatography-high resolution mass spectrometry
Journal of chromatography. A · 2020 · PubMed

Magnetic beads with different supports, binding capacities, and affinity chemistries were compared for immunopurification of GHRH analogues from urine.; The immunopurification protocol was optimized using the magnetic beads that provided better recoveries.; The validated method showed intra-day precision below 15% and inter-day precision below 25%.; Limits of detection and identification were 0.2 ng/mL and 0.5 ng/mL, respectively.

Glycine-modified growth hormone secretagogues identified in seized doping material
Drug testing and analysis · 2019 · PubMed

Seized powders contained glycine-modified analogs of GHRP-2, GHRP-6, Ipamorelin, and modified GRF 1-29.; Modification involved addition of glycine at the N-terminus in all cases.; Analytical methods for growth hormone secretagogues should be updated to include these variants.

The study of doping market: How to produce intelligence from Internet forums
Forensic science international · 2016 · PubMed

Anabolic androgenic steroids, used for body image and performance enhancement, were the most discussed doping product type.; 327 suppliers were detected, mostly selling via dedicated websites or direct e-mail sales.; Temporal analysis showed stability of popular products alongside the emergence of new substances like peptides (e.g., CJC-1295).; The methodology can detect products and suppliers and track temporal trends, supporting online monitoring, customs inspection, and anti-doping analysis.

Qualitative identification of growth hormone-releasing hormones in human plasma by means of immunoaffinity purification and LC-HRMS/MS
Analytical and bioanalytical chemistry · 2016 · PubMed

Method detected four GHRHs (Sermorelin, CJC-1293, CJC-1295, Tesamorelin) and two metabolites with lower limit of detection <50 pg/mL.; Recovery ranged from 19-37%, with imprecision below 20% and acceptable specificity and linearity.; All intact GHRHs were detected in rat plasma up to 4 hours post-administration, but no anticipated metabolites were found in rats.; A Geref metabolite (GHRH3-29) was identified in a human plasma sample after subcutaneous injection, highlighting species differences.

Identification of CJC-1295, a growth-hormone-releasing peptide, in an unknown pharmaceutical preparation
Drug testing and analysis · 2010 · PubMed

The preparation contained a 29 amino acid peptide with a C-terminal amide.; The peptide sequence matched CJC-1295, a growth-hormone-releasing factor.; CJC-1295 is listed as a Prohibited Substance under Section S2 of the WADA Prohibited List.; The substance has potential performance-enhancing effects and is available for illicit use.

Activation of the GH/IGF-1 axis by CJC-1295, a long-acting GHRH analog, results in serum protein profile changes in normal adult subjects
Growth hormone & IGF research : official journal of the Growth Hormone Research Society and the International IGF Research Society · 2009 · PubMed

Two protein spots decreased after treatment: apolipoprotein A1 isoform and transthyretin isoform.; Three protein spots increased after treatment: beta-hemoglobin, a C-terminal albumin fragment, and a mix of immunoglobulin and albumin fragments.; A linear relationship was found between the spot containing immunoglobulin and albumin fragments and IGF-1 levels.; Identified proteins may serve as potential biomarkers for GH and/or IGF-1 activity.

Neuronal M3 muscarinic acetylcholine receptors are essential for somatotroph proliferation and normal somatic growth
Proceedings of the National Academy of Sciences of the United States of America · 2009 · PubMed

Br-M3-KO mice lacking brain M3 muscarinic receptors show a dwarf phenotype with anterior pituitary hypoplasia; Pituitary and serum growth hormone and prolactin are markedly decreased in these mice; Treatment with the GHRH analog CJC-1295 rescued the growth deficit, restoring normal pituitary size and serum GH and IGF-1 levels; Findings support a model in which central (hypothalamic) M3 receptors are required for proper function of hypothalamic GHRH neurons

Frequently asked questions

What is CJC-1295 (no DAC)?

**Mechanism of Action** CJC-1295 (without DAC) is a synthetic tetrasubstituted analog of growth hormone-releasing hormone (GHRH) comprising amino acids 1–29. Its structural modifications (e.g., substitution at positions 2, 8, 15, and 27) confer resistance to dipeptidyl peptidase IV (DPP-IV) degradation, extending its h

How does CJC-1295 (no DAC) work?

Tetrasubstituted GHRH(1-29) analog with improved enzymatic stability that amplifies pulsatile GH secretion.

What is the research status of CJC-1295 (no DAC)?

CJC-1295 (no DAC) is currently classified as experimental, with 36 research references on record. This is for research purposes only and is not medical advice.

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    CJC-1295 (no DAC) — Mechanism, Research & Data | Peptides API