Titus Thorne

Last Updated March 31, 2022

Titus Thorne

 March 31, 2022

Curious about CJC-1295 and want to know more? 

This CJC-1295 review will outline the benefits, dosage, and side effects associated with this research peptide. Researchers will gain a high-level overview of CJC-1295 including its purported benefits and potential side-effects, as well as dosing guidelines that have been used in past clinical trials.

Researchers interested in working with this peptide will find a detailed description of our preferred CJC-1295 vendor at the end of this guide.

Buy CJC-1295 from our #1 recommended vendor...

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What Is CJC-1295? | Overview

CJC-1295 is a synthetic analogue of GHRH and a growth hormone secretagogue (GHS) that was developed by ConjuChem Technologies [1]. Although it has yet to enter clinical trials, this peptide is believed to have application in the realms of anti-aging and athletic performance [2]. Despite showing promise as a research chemical, athletes beware: CJC-1295 is a prohibited substance under Section S2 of the World Anti-Doping Agency’s (WADA) Prohibited List [3].

CJC-1295 peptide is made up of 29 amino acids and is able to bind to receptors in the pituitary gland and stimulate the release of growth hormones such as plasma growth hormone (GH) and insulin-like growth factor 1 (IGF-1) [4].

CJC-1295 vs. CJC-1295 DAC: What’s the Difference?

Medical researchers have the option of buying regular CJC-1295 or CJC-1295 DAC. DAC, which stands for “Drug Affinity Complex”, is a bioconjugation platform that improves the ability of the CJC-1295 peptide to bond with blood protein [5]. Research has indicated that CJC-1295 DAC has a much longer half-life than regular CJC-1295.

Confusion between CJC-1295 and CJC-1295 DAC has arisen because the original CJC-1295 from ConjuChem Technologies contained DAC, yet other manufacturers subsequently began producing CJC-1295 without DAC. To clear up this confusion, CJC-1295 that does not contain DAC is labelled as “CJC-1295 Without DAC” [6].

What Is CJC-1295/Ipamorelin?

CJC-1295/Ipamorelin is a combination of CJC-1295 with Ipamorelin, a selective growth hormone secretagogue that has displayed “high GH releasing potency and efficacy” in clinical studies [7]. This product contains CJC-1295 peptide mixed in a 1:1 ratio with Ipamorelin. Proponents of CJC-1295/Ipamorelin are attracted to Ipamorelin’s proven effectiveness at releasing growth hormone from pituitary cells in rats.

Is CJC-1295 still worthy of further research? Let’s take a deep dive into the pros and cons of this peptide.



CJC-1295 Benefits

At the time of writing, CJC-1295 has yet to complete any clinical trials. Therefore most of its purported benefits are gleaned from the few scientific studies currently available and the numerous testimonials from research subjects online.

Animal studies have confirmed that CJC-1295 acts as a long-lasting GRF analog and is able to activate the GRF receptors on the anterior pituitary in rats [8]. We know that CJC-1295’s potential ability to enhance performance has earned it a spot on WADA’s prohibited substances list and that it is banned from all drug-tested bodybuilding competitions. This adds weight to anecdotal claims that CJC-1295 offers similar benefits to GHRH such as increased muscle mass, fat reduction, and improvements in athletic performance.

Let's take a look at these benefits and claims in more detail…

CJC-1295 Has a Longer Half-Life and Higher Bioavailability Than GHRH 1-29

When it comes to drug efficacy and efficiency, two of the most important metrics to study are half-life and bioavailability. The half-life of a drug is a pharmacokinetic parameter defined as the time it takes for the concentration of the drug in the plasma or the total amount in the body to be reduced by 50% (half) [9]. Essentially the longer the half-life is, the longer the drug stays around in an active form.

The other piece of the puzzle is bioavailability. Bioavailability is essentially how much of the drug becomes available to its target destination [10]. If something has a low bioavailability, few benefits will be realized when administered to test subjects.

CJC-1295 DAC is a bioconjugate analogue of GHRH 1-29 meaning that is has a longer half-life and higher bioavailability due to bioconjugation, as described below [5]:

“Bioconjugation is a chemical technique used to couple two molecules together, at least one of which is a biomolecule, such as a carbohydrate, nucleic acid, or protein.

Proteins are especially diverse biomolecules due to the variety of amino acids available and are thus important substrates in bioconjugation reactions. Bioconjugation reactions play a critical role in the modification of proteins.

Because of recent advances in the study of biomolecules, proteins can be modified to perform a variety of functions, including cellular tracking, imaging biomarkers, and target drug delivery.”

CJC-1295 DAC can form bioconjugates very efficiently with albumin, a water-soluble globular protein. This reduces the rate of degradation and increases the half-life of this peptide. [8]

CJC-1295 May Promote Deep Sleep

Several studies have suggested that GHRH plays a direct role in improving the quality of sleep. In one study by Fehm et al, researchers looked at intranasal administration of GHRH and documented the effect it had on sleep quality [11]:

“A study was performed according to a double-blind cross-over design. Each of 12 young and 11 old healthy men were intranasally administered with 300 micrograms GHRH (vs. placebo) 30 min before bedtime at 23:00 h.

Sleep was recorded polysomnographically until 07:00 h and blood was collected in 15 min intervals for determination of cortisol and GH. Apart from the well-known age-related changes of hormonal secretion and sleep, intranasal GHRH reduced cortisol nadir concentrations in the beginning of sleep (P < 0.05), and also reduced the sleep-induced elevation in GH concentrations during early sleep.

Moreover, results indicated that after intranasal administration GHRH increased rapid-eye-movement (REM) sleep and slow wave sleep (SWS), with this influence concentrating on the second half of sleep time. Effects of GHRH did not depend on the subject's age.

We conclude that there is a coordinate influence of intranasal GHRH on the central nervous regulation of sleep processes and of hypothalamic-hypophysiotropic secretory activity in both young and elderly men. The effects may mimic the dual neuronal and endocrine function of hypothalamic GHRH activity.”

While this study didn’t specifically look at CJC-1295, we know this compound is an analogue of GHRH. Sleep has been linked to a myriad of benefits including tissue repair, bone and muscle density increase and a stronger immune system [12]. GH has also been shown to enhance non-REM sleep after a period of sleep deprivation [13].

CJC-1295 Increases Pulsatile GH Secretion and IGF-1 Levels

Pulsatile GH secretion is needed to get the most out of the hormone’s benefits. IGF-1 levels are also important for muscle growth. A study conducted at the University of Chicago details how CJC-1295 positively affects pulsatile GH secretion and IGF-1 levels [14]:

“CJC-1295 increased through and mean GH secretion and IGF-1 production with preserved GH pulsatility. The marked enhancement of trough GH levels by continuous GHRH stimulation implicates the importance of this effect on increasing IGF-1. Long-acting GHRH preparations may have clinical utility in patients with intact pituitary GH secretory capability.”

The interesting thing is that this increase in pulsatile GH and IGF-1 is not associated with side effects typically seen with excess GH and IGF-1 in the body.

“It is noteworthy that despite the nearly 50% increase in GH secretion and IGF-1 levels, some of which reached the upper limit of normal, none of the subjects experienced any adverse effects attributable to excessive GH or IGF-1. This may have been due to the short duration of the study, but may also reflect a protective feedback mechanism to limit the extent of CJC-1295 stimulation of GH secretion. Based on the latter assumption, the use of CJC-1295 or other GHRH analogs may confer an intrinsic advantage over that of GH as a therapeutic agent in those patients with an intact pituitary GH secretory capacity.”

These findings support claims that CJC-1295 can be used to increase the concentration of both of these important growth hormones, potentially without the side effects that typically come from having higher than normal levels of GH.

CJC-1295 May Increase Muscle Mass

Though GH and IGF-1 have both been studied in muscle anabolism, IGF-1 is more accepted as an agent of muscle hypertrophy. IGF-1 receptor activation promotes muscle anabolism by activating PI3K/Akt [15].

“Growth hormone (GH) is widely used as a performance-enhancing drug. One of its best-characterized effects is increasing levels of circulating insulin-like growth factor I (IGF-I), which is primarily of hepatic origin.

It also induces the synthesis of IGF-I in most non-hepatic tissues. The effects of GH in promoting postnatal body growth are IGF-I dependent, but IGF-I-independent functions are beginning to be elucidated. Although benefits of GH administration have been reported for those who suffer from GH deficiency, there is currently very little evidence to support an anabolic role for supraphysiological levels of systemic GH or IGF-I in skeletal muscle of healthy individuals.

There may be other performance-enhancing effects of GH. In contrast, the hypertrophic effects of muscle-specific IGF-I infusion are well documented in animal models and muscle cell culture systems.”

Since CJC-1295 has been shown to increase GH and IGF-1 over a long period, it is reasonable to assume that an increase in muscle hypertrophy will be present over a longer period as well leading to a larger window of gains. Muscle-building exercise leads to many benefits including:

  • Improved balance,
  • Improved blood-sugar control,
  • Improved mental health, and
  • Increased fat loss.

CJC-1295 May Stimulate Fat Loss

Studies have shown that prolactin promotes visceral fat accrual in various animal models [16] and that JC-1295 can normalize prolactin levels as shown in GHRH knockout mice [17], which can lead to increased fat metabolization:

“The observed increase in prolactin RNA was much less marked than the increase in GH mRNA and was not dose-dependent. Nevertheless, CJC-1295 normalized prolactin mRNA levels. This increase likely reflects some degree of GHRH-induced proliferation of the mammotroph cells, previously reported in mice overexpressing GHRH.”

From these findings, it seems that CJC-1295 can also help with fat loss through prolactin regulation.



CJC-1295 Side Effects and Appropriate Dosage

Since there have been no clinical trials of CJC-1295 to date, our understanding of this compound’s side effects and appropriate dosage is limited.

We do know that in the early days of the drug’s development, ConjuChem tested CJC-1295 DAC as a potential treatment for lipodystrophy. One of the patients in the study died, though the attending physician concluded that the cause was not due to CJC-1295 [18].

The most common self-reported side effects of CJC-1295 are [

  • Flu-like symptoms,
  • Headaches,
  • Irritability,
  • Anxiety,
  • Nausea, and
  • Hives.

While CJC-1295 has yet to undergo human clinical trials, medical researchers may be able to extrapolate an appropriate dosage range based on available scientific research. To date, the only published research into the effects of CJC-1295 DAC on human test subjects is a 2006 study by Teichman et al [20].

The study found that:

  • CJC-1295 DAC can be administered as weekly or biweekly injections.
  • Effective doses range from 30 μg/kg and 60 μg/kg per week.

Based on these findings, a 75 kg test subject would require 2,250-4,500 μg (micrograms or mcg) per week.

According to statements from functional medicine experts Lindgren, CJC-1295 DAC and CJC-1295/Ipamorelin should be administered to test subjects first thing in the morning, or late at night to prevent dietary glucose from interfering with the peptide’s action [21]. Most research participants will need to continue this schedule for around three months (12 weeks) to start seeing an increase in the amount of GH isolates produced by their pituitary gland.

Where To Buy CJC-1295 Online | 2022

Reserchers interested in where to buy CJC-1295 online will be pleased to know that our team has done the legwork and tested a handful of peptides vendors known for their product quality, transparency and efficiency.

Researchers intent on purchasing CJC-1295 online from a single source are highly advised to consider Peptide Sciences.

Here are a few reasons as to why we rank Peptide Sciences as #1 above all other research peptide vendors:

  • World-Class Customer Service: Peptide Sciences treat every customer with respect and respond promptly to all communications. Their answers are timely and straight-forward.
  • GREAT Prices: CJC-1295 iterations are all very reasonably priced, and there are some generous discounts for bulk orders.
  • Flexible Payment Options: Peptide Sciences accepts all major cards and cryptocurrencies, and several third-party payment apps, 
  • The HIGHEST Purity Peptides Available: Every peptide featured is 100% USA-made, going through high-performance liquid chromatography and mass spectrometry to exceed 99% purity and ensure researchers get the right product for their experiments.
  • Fast Shipping: All orders are shipped within 24 hours and typically arrive at U.S. destinations within 2-3 business days and international spots within 7-10 days. All U.S. orders over $100 ship free. 

Don’t look any further for a vendor! Peptides Sciences is the best.

P.S: All peptides created and sold by Peptide Sciences are 100% TFA-free! Trifluoroacetic acid is found in many of the peptides from low-quality vendors who import from China. Without getting too deep into the science here, TFA can be exceptionally dangerous.

Buy CJC-1295 from our #1 recommended vendor...

 Review of CJC-1295 | Verdict

Hopefully, this CJC-1295 review has answered all the questions of researchers curious about CJC-1295. While there is scant scientific evidence on this research peptide, it has demonstrated potential as a growth hormone-releasing hormone (GHRH) analogue that stimulates both GH and IGF-1. As higher levels of both of these hormones have been linked to performance-enhancing effects such as increased muscle mass, better sleep and decreased fat, CJC-1295 remains an ongoing interest to researchers in the field of peptide research.

Researchers wishing to explore the benefits and side effects of CJC-1295 further are advised to contact Peptide Sciences for more information.



  1. Next Generation Medicines from Therapeutic Peptides | ConjuChem LLC. Conjuchem.com. (2021). Retrieved 13 March 2021, from http://www.conjuchem.com/.
  2. Henninge J, Pepaj M, Hullstein I, Hemmersbach P. Identification of CJC-1295, a growth-hormone-releasing peptide, in an unknown pharmaceutical preparation. Drug Test Anal. 2010 Nov-Dec;2(11-12):647-50. doi: 10.1002/dta.233. Epub 2010 Dec 10. PMID: 21204297.
  3. What is Prohibited. World Anti-Doping Agency. (2021). Retrieved 26 February 2021, from https://www.wada-ama.org/en/content/what-is-prohibited/prohibited-at-all-times/peptide-hormones-growth-factors-related-substances-and-mimetics.
  4. ScienceDirect. (2021). Retrieved 26 February 2021, from https://www.sciencedirect.com/science/article/pii/S205005211730032X.
  5. Introduction to Bioconjugation. Chemistry LibreTexts. (2021). Retrieved 26 February 2021, from https://chem.libretexts.org/Bookshelves/Organic_Chemistry/Supplemental_Modules_
  6. CJC1295 Without DAC. Pubchem.ncbi.nlm.nih.gov. (2021). Retrieved 26 February 2021, from https://pubchem.ncbi.nlm.nih.gov/compound/CJC1295-Without-DAC#section=Biologic-Description.
  7. Raun K, Hansen BS, Johansen NL, Thøgersen H, Madsen K, Ankersen M, Andersen PH. Ipamorelin, the first selective growth hormone secretagogue. Eur J Endocrinol. 1998 Nov;139(5):552-61. doi: 10.1530/eje.0.1390552. PMID: 9849822.
  8. Albumin_Bioconjugates_Activate_the_GRF_Receptor_on_the_Anterior_Pituitary_in_
    Rats_Identification_of_CJC-1295_as_a_Long_Lasting_GRF_Analog. (2021). Retrieved 26 February 2021, from https://www.researchgate.net/publication/228484039_hGRF1-29-.
  9. Yolanda Smith, B. (2021). What is the Half-Life of a Drug?. News-Medical.net. Retrieved 26 February 2021, from https://www.news-medical.net/health/What-is-the-Half-Life-of-a-Drug.aspx#:~:text=The%20elimination%20half%2Dlife%20of,half%20of%20the%20
  10. Price, G., & Patel, D. (2021). Drug Bioavailability. Ncbi.nlm.nih.gov. Retrieved 26 February 2021, from https://www.ncbi.nlm.nih.gov/books/NBK557852/#:~:text=Definition%2FIntroduction,
  11. Perras, B., Marshall, L., Köhler, G., Born, J., & Fehm, H. L. (1999). Sleep and endocrine changes after intranasal administration of growth hormone-releasing hormone in young and aged humans. Psychoneuroendocrinology, 24(7), 743–757. https://doi.org/10.1016/s0306-4530(99)00027-x
  12. Ba, & Social Distancing, Q. (2021). Basics on Sleep. WebMD. Retrieved 26 February 2021, from https://www.webmd.com/sleep-disorders/sleep-101#:~:text=During%20the%20deep%20stages%20of,and%20get%20less%20deep%
  13. Schüssler, P., Yassouridis, A., Uhr, M., Kluge, M., Weikel, J., Holsboer, F., & Steiger, A. (2006). Growth hormone-releasing hormone and corticotropin-releasing hormone enhance non-rapid-eye-movement sleep after sleep deprivation. American journal of physiology. Endocrinology and metabolism, 291(3), E549–E556. https://doi.org/10.1152/ajpendo.00641.2005
  14. Citeseerx.ist.psu.edu. (2021). Retrieved 26 February 2021, from http://citeseerx.ist.psu.edu/viewdoc/download?doi=
  15. Velloso C. P. (2008). Regulation of muscle mass by growth hormone and IGF-I. British journal of pharmacology, 154(3), 557–568. https://doi.org/10.1038/bjp.2008.153
  16. (2021). Retrieved 26 February 2021, from https://academic.oup.com/jcem/article/89/9/4445/2844545.
  17. Once-daily administration of CJC-1295, a long-acting growth hormone-releasing hormone (GHRH) analog, normalizes growth in the GHRH knockout mouse | American Journal of Physiology-Endocrinology and Metabolism. Journals.physiology.org. (2021). Retrieved 26 February 2021, from https://journals.physiology.org/doi/full/10.1152/ajpendo.00201.2006.
  18. Patient Died in Lipodystrophy Drug Study. Natap.org. (2021). Retrieved 26 February 2021, from https://www.natap.org/2006/newsUpdates/081106_02.htm.
  19. Netnography of Female Use of the Synthetic Growth Hormone CJC-1295: Pulses and Potions. Taylor & Francis. (2021). Retrieved 26 February 2021, from https://www.tandfonline.com/doi/abs/10.3109/10826084.2015.1082595?journalCode=isum20.
  20. Sam L. Teichman, Ann Neale, Betty Lawrence, Catherine Gagnon, Jean-Paul Castaigne, Lawrence A. Frohman, 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, The Journal of Clinical Endocrinology & Metabolism, Volume 91, Issue 3, 1 March 2006, Pages 799–805, https://doi.org/10.1210/jc.2005-1536
  21. Regenerative Medicine Promotes Cellular Level Healing. Lindgren.Health. (2021). Retrieved 28 February 2021, from https://lindgren.health/regenerative-medicine.

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