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CJC-1295 with DAC - Exploring Peptides

CJC-1295 with DAC is a synthetic peptide analog of growth hormone–releasing hormone (GHRH), designed to increase growth hormone (GH) secretion and stimulate IGF-1 production. The addition of Drug Affinity Complex (DAC) significantly extends its half-life, allo

By Recovery & Performance Peptides Editorial Team

CJC-1295 with DAC is a synthetic peptide analog of growth hormone–releasing hormone (GHRH), designed to increase growth hormone (GH) secretion and stimulate IGF-1 production. The addition of Drug Affinity Complex (DAC) significantly extends its half-life, allowing for weekly dosing and more stable GH levels. CJC-1295 with DAC has been shown to increase circulating growth hormone and IGF-1 levels, which are associated with processes such as muscle development, fat metabolism, tissue repair, skin health, and immune system regulation.

Category

Peptide Hormone Analog (GH Secretagogue)

Sequence

Tyr-D-Ala-Asp-Ala-Ile-Phe-Thr-Gln-Ser-Tyr-Arg-Lys-Val-Leu-Ala-Gln-Leu-Ser-Ala-Arg-LysLeu-Leu-Gln-Asp-Ile-Leu-Ser-Arg-Lys-DAC

Molecular Weight

Approximately 3647.954 g/mol

Molecular Formula

C152H252N44O42 (without DAC)

Half Life

6-8 days

Most Common Uses

CJC-1295 with DAC is primarily used in research settings to evaluate its effectiveness in stimulating the pituitary gland to release growth hormone (GH). By binding to albumin through the Drug Affinity Complex (DAC), it extends the half-life of the peptide, allowing for more sustained GH release. This prolonged exposure to elevated GH levels is central to the peptide’s research value, especially in studies exploring hormonal regulation and metabolic health.

Promotion of Lean Muscle Mass and Fat Reduction

Increased growth hormone and IGF-1 levels are associated with improved body composition. Research has focused on how CJC-1295 with DAC may promote anabolic processes, such as protein synthesis and nitrogen retention, which are key for lean muscle development. Simultaneously, GH is known to stimulate lipolysis, the breakdown of fat stores for energy, suggesting potential applications in fat reduction and metabolic efficiency.

By enhancing protein synthesis and satellite cell activation, IGF-1 aids muscle repair and regeneration, which proves beneficial during recovery from intense physical activity. This involves satellite cells proliferating and fusing with existing muscle fibers to repair damage and promote growth. GH also increases collagen synthesis, strengthens connective tissues, and reduces injury risk during training, which supports long-term muscle development.

Recovery from Training or Injury

GH and IGF-1 are important for tissue repair and regeneration. Studies on CJC-1295 with DAC have investigated its role in accelerating recovery from physical training or soft tissue injuries. Increased GH levels can support muscle fiber repair, reduce inflammation, and aid in the regeneration of connective tissues, making this peptide of interest in sports medicine and rehabilitation research.

Collagen Synthesis and Skin Elasticity

Collagen production declines with age, contributing to skin thinning and reduced elasticity. Growth hormone has been linked to increased collagen synthesis in the dermis. Research involving CJC-1295 with DAC explores whether its ability to boost GH levels can support skin health by enhancing firmness, hydration, and reducing the appearance of fine lines over time.

The mechanism by which GH supports collagen synthesis involves signaling pathways that activate fibroblast proliferation and extracellular matrix production. Increased GH levels can enhance the expression of transforming growth factor-beta (TGF-β), a cytokine that stimulates collagen and elastin formation, contributing to a thicker, more resilient dermal layer. Research suggests that CJC-1295 with DAC’s ability to maintain higher GH levels may also improve skin hydration by supporting the production of glycosaminoglycans, such as hyaluronic acid, which retain water in the skin.

Energy, Libido, and Well-Being

Growth hormone (GH) plays a significant role in regulating mood, energy levels, and sexual health, contributing to an overall sense of vitality. Research on CJC-1295 with DAC, a growth hormone-releasing hormone (GHRH) analog, has explored its ability to increase GH levels, with studies noting improvements in energy, libido, and general well-being, particularly in individuals with lower baseline GH levels. By extending the half-life of GHRH, CJC-1295 with DAC promotes sustained GH release, which may enhance physiological resilience and hormonal balance.

The effects of GH on energy and well-being are tied to its role in optimizing mitochondrial function and glucose metabolism, which provide cells with the energy needed for daily activities. Increased GH levels may boost the production of ATP, the body’s primary energy currency, leading to greater stamina and reduced fatigue.

Libido improvements observed with CJC-1295 with DAC likely stem from GH’s influence on testosterone production and vascular health. GH can stimulate the hypothalamic-pituitary-gonadal axis, indirectly supporting sex hormone levels, which are critical for sexual desire and performance. Improved blood flow, driven by GH’s effects on nitric oxide production, may also enhance erectile function and sexual responsiveness. These benefits are particularly pronounced in individuals with age-related GH declines, where hormonal imbalances often contribute to reduced libido.

Potential Anti-Aging Applications

As natural GH levels decline with age, researchers have explored CJC-1295 with DAC for its possible anti-aging effects. Studies are examining its ability to restore more youthful GH profiles in older populations, which may be linked to improvements in body composition, skin quality, recovery, and overall vitality. These investigations aim to better understand how GH modulation can influence aging biomarkers and age-related decline.

Warnings and Cautions

CJC-1295 with DAC is generally well tolerated in research, but potential side effects may include water retention, tingling or numbness in extremities, joint pain, or flu-like symptoms. It should not be used by individuals with active cancer due to GH’s potential to accelerate tumor growth.

This compound is intended for research purposes only and is not approved for human use outside of clinical studies. Counterfeit products in unregulated markets may pose additional safety concerns.

Dosages

Dosages in research are individualized and typically administered via subcutaneous injection. Common protocols include:

100 mcg per injection, 2 times per week.

Cycling regimens (e.g., 8-12 weeks on, 4 weeks off) to prevent desensitization.

Often dosed at bedtime to align with natural GH pulses.

Dosing should be tailored to research goals and subject response, with careful monitoring.

Mechanism of Action

CJC-1295 with DAC works by mimicking the body’s natural growth hormone–releasing hormone (GHRH). It binds to specific receptors in the pituitary gland, triggering the release of growth hormone (GH) in pulses, much like how the body normally produces it. This pattern of release helps keep the body’s hormone signaling in balance and supports normal physiological responses.

What sets CJC-1295 with DAC apart is the DAC component—a chemical structure that allows the peptide to attach to a protein in the blood called albumin. This connection helps protect the peptide from being broken down too quickly, giving it a much longer duration of action. While natural GHRH is cleared from the body in minutes, CJC-1295 with DAC can stay active for nearly a week, making it useful in studies that aim to maintain more consistent GH levels over time.

The increase in GH also leads to more production of insulin-like growth factor 1 (IGF-1), mainly in the liver. IGF-1 plays a key role in cell growth, muscle building, and tissue repair. Together, GH and IGF-1 support protein production, help the body burn fat for energy, and assist in healing after physical stress or injury.

Structure and Pharmacology

CJC-1295 with DAC is a 30-amino-acid peptide with a modified sequence to resist enzymatic breakdown. Its structure includes D-amino acids for stability, and the DAC conjugate enhances plasma retention. The base molecular formula is C152H252N44O42, with a molecular weight of ~3,647.09 g/mol (without DAC).

Pharmacologically, it shows high receptor affinity and low toxicity in research models. It remains stable when lyophilized and stored at 2-8°C, reconstituted with bacteriostatic water for injection. Subcutaneous administration yields near-100% bioavailability, with peak GH levels within hours.

History

CJC-1295 with DAC was developed in the early 2000s by ConjuChem, a biotechnology company based in Canada. The goal was to create a long-acting version of growth hormone–releasing hormone (GHRH) that could stimulate the body’s own production of growth hormone with less frequent dosing. The key innovation was the Drug Affinity Complex (DAC), a molecular attachment that allows the peptide to bind to albumin in the bloodstream. This significantly extended its half-life compared to natural GHRH, which is rapidly broken down in the body.

Initial research focused on using CJC-1295 with DAC to treat growth hormone deficiency and related metabolic disorders. Early clinical trials showed promise in increasing growth hormone and IGF-1 levels over an extended period, but regulatory challenges and limited commercial success led to a shift away from therapeutic development. As a result, the compound found its primary role in the research community, where it remains under investigation for its effects on hormone regulation, metabolism, and tissue repair.

Sourcing

USA

LIMITLESS LIFE NOOTROPICS aka Biotech

Use Discount Code: EP20

SCANTIFIX

Use Discount Code: Exploringpeptides

Canada

BIOSLAB

Use Discount Code: EP10

Europe

DNLABResearch

Use Discount Code: EP15

Australia

LVLUPHEALTH

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CONNECTED / MODULES

Post-session references

Selected from shared article topics. Source links are retained where available.

01

Handling & safety lane

Source-derived education, not individual medical guidance or an instruction to dose.

STORAGE

Reconstitution and Storage: Essential Steps for Researchers

Handling peptides correctly after they arrive is absolutely critical for maintaining their stability and efficacy. We've seen promising research derailed by improper reconstitution or storage, and it's a frustrating, preventable setback. For any CJC-1295 beginners guide, this section is indispensable. When you receive your lyophilized (freeze-dried) CJC-1295, it's a stable powder. However, once you reconstitute it, things change. Reconstitution typically involves mixing the peptide powder with a sterile diluent, most commonly Bacteriostatic Reconstitution Water (bac). It's crucial to use the correct amount of diluent to achieve your desired concentration, and to do so gently. We recommend slowly adding the water down the side of the vial, then allowing it to dissolve naturally without vigorous shaking, which can degrade the peptide structure. This approach (which we've refined over years) delivers real results. Once reconstituted, CJC-1295 becomes much more fragile. It must be stored refrigerated, typically at 2-8°C (36-46°F), and kept away from light. Freezing can sometimes extend its lifespan further, but repeated freeze-thaw cycles are generally detrimental. Our team advises researchers to reconstitute only what they need for a specific period and to discard any unused portions after a recommended timeframe, usually a few weeks to a month, depending on the specific peptide and storage conditions. This meticulous approach ensures the integrity of your research material, ma…
SIDE EFFECTS

Side Effects

Clinical trials reported that CJC-1295 was generally well-tolerated, with no serious adverse reactions at therapeutic doses. Common Side Effects: Injection site reactions (redness, pain, swelling) Flushing and warmth, particularly facial flushing lasting 5–10 minutes post-injection Water retention Headaches Dizziness Increased hunger Tingling or numbness in extremities Fatigue or lethargy initially Less Common Side Effects: Nausea Joint discomfort Mood changes Anxiety Flu-like symptoms Potential Concerns: The FDA has noted concerns about increased heart rate and cardiac events associated with CJC-1295. Individuals with active cancer, cardiovascular disease, or diabetes should exercise caution, as elevated GH and IGF-1 can theoretically promote cell proliferation and affect glucose metabolism.
02

Question drills

Open a question for its connected answer.

01What If I'm designing a 28-day metabolic adaptation study — should I use CJC-1295 or daily GHRH injections?+

Use CJC-1295. Weekly dosing eliminates the stress artifact introduced by daily handling and injection, and sustained IGF-1 elevation better replicates chronic GH sufficiency than episodic pulses. Daily GHRH would require 28 injections per subject; CJC-1295 requires 4, reducing handling-induced cortisol confounds and improving data consistency across the cohort.

SOURCE / realpeptides.co ↗
02What If I Experience Joint Pain on CJC-1295?+

Joint discomfort on CJC-1295 typically indicates fluid retention from elevated IGF-1 stimulating sodium reabsorption in the kidneys. This is dose-dependent and resolves by reducing the dose by 25–40%. From 1000mcg to 600–750mcg, for example. Persistent joint pain despite dose reduction may indicate an underlying issue unrelated to the peptide, such as osteoarthritis exacerbated by increased activity levels from improved recovery, and warrants clinical evaluation rather than continued peptide use.

SOURCE / realpeptides.co ↗
03What If IGF-1 Increases Less Than 20ng/mL After 8 Weeks on the Standard 50+ Protocol?+

Increase the GHRP dose to 250–300mcg per administration while keeping CJC-1295 at 200mcg twice weekly. If IGF-1 remains unchanged after another 4 weeks, the limitation is likely hepatic, not pituitary. Order a metabolic panel (fasting glucose, HbA1c, liver enzymes) and assess for insulin resistance or hepatic steatosis. Correcting the metabolic substrate through dietary intervention or metformin often restores IGF-1 responsiveness within 6 weeks. Increasing CJC-1295 dose beyond 200mcg twice-weekly in confirmed non-responders achieves nothing except higher peptide waste.

SOURCE / realpeptides.co ↗
04What if I miss a scheduled CJC-1295 dose by several days?+

Administer the missed dose as soon as you remember and resume your regular schedule. Because CJC-1295 has a half-life of 6–8 days, missing a dose by 2–3 days still leaves residual peptide in circulation. GH pulses may decrease in amplitude but do not cease entirely. Do not double-dose to compensate. Pharmacokinetic data from Phase I trials show that doses above 120 mcg/kg do not produce proportionally greater GH response and increase the likelihood of injection site reactions.

SOURCE / realpeptides.co ↗
05What If My CJC-1295 Turned Cloudy Overnight?+

Discard it immediately. Progressive cloudiness developing 12–72 hours after reconstitution indicates bacterial contamination or a temperature excursion that compromised peptide stability. Even if the vial was refrigerated, internal refrigerator temperature fluctuations (especially in units that cycle on and off frequently) can cause transient warming sufficient to trigger aggregation. Review your reconstitution technique. Were sterile alcohol swabs used on both the peptide vial and bacteriostatic water vial before each needle puncture? Was the needle changed between drawing diluent and injecting it into the peptide vial? Any lapse introduces contamination risk.

SOURCE / realpeptides.co ↗
03

Evidence cooldown

Research context and source excerpts for a slower second read.

RESEARCH

Palmetto Peptides Complete Guide to the Research Peptide CJC-1295 with DAC

Research Notice: This article covers research topics relevant to CJC-1295 with DAC — available from Palmetto Peptides for laboratory use only. Research Use Only Disclaimer: All peptides listed on this page are sold exclusively for in vitro and legitimate laboratory research purposes. They are not intended for human consumption, veterinary use, or any clinical application. The information in this article is for scientific and educational reference only and does not constitute medical advice. All research use must comply with applicable federal, state, and institutional regulations. Palmetto Peptides complies fully with all applicable FDA guidelines. DISCLAIMER: This article is for educational and scientific research reference purposes only. All compounds discussed are not approved by the FDA for use in humans or animals. All data discussed here reflects preclinical animal research or laboratory use. Palmetto Peptides sells these compounds exclusively for in vitro and preclinical laboratory research. Nothing in this article constitutes medical advice. Last Updated: May 18, 2026 | Reading Time: Approximately 14 minutes | Author: Palmetto Peptides Research Team

RESEARCH

Purity and Precision: Our Commitment to Research Excellence

When working with peptides as intricate and influential as the CJC-1295 GHRH analog with DAC, the purity of the compound isn't just a preference; it's an absolute requirement. Impurities, even in trace amounts, can introduce confounding variables, skew results, and ultimately undermine the validity of years of painstaking research. This is why our team at Real Peptides adheres to an unflinching standard of quality that sets us apart. We mean this sincerely: it runs on genuine connections built on trust and verifiable results. Every batch of CJC-1295 GHRH analog with DAC we produce undergoes rigorous third-party testing to verify its purity and identity. We utilize advanced analytical techniques, including High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS), to ensure that what's in the vial is precisely what's on the label—no compromises. This commitment extends across our entire product line, from our Adamax Peptide 10mg to our Wolverine Peptide Stack. We understand the demanding schedules and high expectations that researchers face, and we aim to eliminate any concerns regarding the quality of their starting materials. It’s what empowers innovation. Our small-batch synthesis approach for peptides like the CJC-1295 GHRH analog with DAC ensures meticulous control at every stage, from amino acid sequencing to lyophilization. This isn't just a talking point; it's our foundational operating principle. We've found that this level of attention to detail is indispensable for delivering the consistency and reliability that cutting-edge biological research demands in 2026. Researchers deserve nothing less than the best, and that's precisely what we strive to provide.

05

Product & matchup locker

Linked catalog and comparison files.

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