Quick answer: CJC-1295 is a synthetic, long-acting analog of growth hormone-releasing hormone (GHRH) that has been extensively studied for its ability to produce sustained increases in growth hormone and IGF-1 in research settings.
CJC-1295 is one of the most studied compounds in growth hormone research, and it is frequently mentioned alongside ipamorelin. So, what is CJC-1295? Here is a clear look at what it actually is and what to check before sourcing it.
What is CJC-1295?
CJC-1295 is a synthetic analog of growth hormone releasing hormone, usually shortened to GHRH. [1] What is CJC-1295 in terms of its research profile? According to PubMed, it was studied as a long-acting GHRH analog. [2] In that research it produced sustained increases in growth hormone and IGF-1 and had a much longer half-life than the natural hormone, with effects measured over several days after a single dose (Teichman et al., 2005, DOI).
Why the long-acting part matters in research
Natural GHRH breaks down quickly, which limits how it can be studied. [1] The reason CJC-1295 drew so much research interest is that it lasts far longer, which is what the published work focused on. [1] That extended duration is the defining feature of the compound and the main reason it shows up so often in growth hormone literature.
How it relates to ipamorelin
CJC-1295 acts on the GHRH receptor pathway. [3] Ipamorelin acts on a different pathway, the ghrelin or GHRP receptor. [1] Because the two work through different routes, they are often studied together, which is why a CJC-1295 and Ipamorelin blend exists as a single research product. For the full breakdown, see our ipamorelin vs CJC-1295 comparison.
Sourcing CJC-1295
With any in-demand compound, documentation is what protects you. Look for a per batch Certificate of Analysis you can see before you buy, HPLC purity on the specific lot, mass spectrometry confirmation, and a lot number tied to your vial.
Peptide Hackers carries CJC-1295, along with the CJC-1295 and Ipamorelin blend, with that documentation on every batch. For researchers in the Los Angeles and Orange County areas, you can order online and pick up the same day in person, with shipping available if you prefer delivery. The full catalog is at peptidehackers.com.
All products are for laboratory research only. Not for human or veterinary use.
What is a Peptide?
Peptides are short chains of amino acids linked by peptide bonds. They are distinct from proteins, which are typically longer chains. The specific sequence and three-dimensional shape of a peptide can determine its biological role in research. Researchers study many different types of peptides, including linear, cyclic, and branched forms, to understand their potential applications. For example, BPC-157 and TB-500 are two well-known research peptides.
Emerging Research Directions in Peptide Science
The field of peptide research is continually evolving, with new synthesis methods and applications under investigation. Recent studies have explored the potential of cyclic peptides, which possess constrained molecular structures that may offer improved stability and binding characteristics compared to their linear counterparts. Another area of interest is peptide-drug conjugates, which are being investigated as targeted delivery platforms for various research compounds. Advances in peptide synthesis, drawing inspiration from natural processes, also promise to enable the creation of more complex and diverse peptide structures for future studies.
Frequently Asked Questions
What is the difference between a peptide and a protein?
While both peptides and proteins are composed of amino acids linked by peptide bonds, the primary distinction lies in their size. Peptides are generally shorter chains of amino acids, typically up to 50 amino acids, whereas proteins are longer, more complex structures. The true functional difference often relates to their folding and structural complexity.
What is peptide synthesis?
Peptide synthesis refers to the process of creating peptides by linking amino acids in a specific sequence. Historically, this involved classical solution-phase techniques, but modern research and development settings often utilize more advanced solid-phase synthesis methods to achieve higher purity and efficiency.
What is the significance of cyclic peptides in research?
Cyclic peptides are attracting significant research interest due to their constrained molecular structure. This unique conformation can potentially improve their stability against enzymatic degradation and enhance their binding characteristics to target molecules, making them valuable for investigating new research applications.
What is a GHRH analog?
A GHRH analog, such as CJC-1295, is a synthetic compound designed to mimic the action of natural Growth Hormone Releasing Hormone (GHRH). These analogs are often engineered to have a longer half-life or altered binding properties, allowing researchers to study sustained effects on growth hormone secretion.
References
- Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications, and Future Perspectives — Int J Mol Sci (2026). PMID: 42123471
- Prolonged stimulation of growth hormone (GH) and insulin-like growth factor I secretion by CJC-1295, a long-acting analog of GH-releasing hormone, in healthy adults — J Clin Endocrinol Metab (2006). PMID: 16352683
- Therapeutic peptides in gerontology: mechanisms and applications for healthy aging — Front Aging (2026). PMID: 42021992
Research Use Only
This article is provided for educational purposes. All peptides discussed are sold for research use only and are not intended for human consumption or therapeutic use.