CJC-1295 With DAC vs Without DAC UK (2026): Differences Explained

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CJC-1295 DAC vs No DAC UK Research Guide · Written by Raquel Whatmough, Founder of MyPep Biotech · Updated October 2026 · Strictly for laboratory research use only

CJC-1295 comes in two versions, with DAC and without DAC, and the difference matters a great deal in growth hormone research. This guide explains what DAC means, how the two versions behave in research models, why many researchers prefer CJC-1295 without DAC, how it pairs with Ipamorelin, and UK legal status and prices.

What Is the Difference Between CJC-1295 With DAC and Without DAC?

The short answer: DAC stands for Drug Affinity Complex. It lets CJC-1295 attach to albumin in the blood, so the version with DAC lasts for days and gives a long, steady rise in growth hormone. The version without DAC, also called Modified GRF (1-29), lasts only a short time and gives short pulses of growth hormone, similar to the body’s natural rhythm.

	CJC-1295 with DAC	CJC-1295 without DAC
Also called	CJC-1295 DAC	Modified GRF (1-29), Mod GRF
How long it lasts in research models	Days (binds to albumin)	Short, under an hour
Growth hormone pattern	Long, steady elevation	Short pulses, like the natural rhythm
Usually paired with Ipamorelin?	Sometimes	Very often
Supplied by MyPep	No	Yes: 10mg vial £29.99

What Is CJC-1295?

CJC-1295 is a synthetic version of growth hormone-releasing hormone (GHRH). It is based on the first 29 amino acids of GHRH, with four amino acids swapped to make it more stable. GHRH tells the pituitary gland to release growth hormone, so CJC-1295 is studied for its effect on GH release.

What Does DAC Do?

DAC is a small chemical add-on that allows the peptide to bind to albumin, a common protein in blood. Bound to albumin, the peptide is protected from being broken down, so it stays active for days instead of minutes. Early clinical studies of CJC-1295 with DAC reported sustained rises in GH and IGF-1 over several days.

Why Do Many Researchers Prefer CJC-1295 Without DAC?

Natural growth hormone is released in pulses, mostly at night. CJC-1295 without DAC acts briefly, so it produces short pulses that mirror this natural pattern, while the DAC version keeps levels raised continuously. Researchers who want to study pulsatile GH release, often alongside Ipamorelin, usually choose the no-DAC version.

CJC-1295 and Ipamorelin

CJC-1295 without DAC is most often paired with Ipamorelin, which works on a different receptor (the ghrelin receptor). Together they are the most popular combination in growth hormone research. Read our CJC-1295 and Ipamorelin guide.

CJC-1295 Price in the UK

CJC-1295 10mg vial (no DAC): £29.99
CJC-1295 + Ipamorelin vial: £28.99
CJC-1295 + Ipamorelin 20mg blend pen: £54.99
Ipamorelin 10mg vial: £24.99

All are dispatched the same day before 2pm with tracked UK delivery, and orders over £75 ship free.

Is CJC-1295 Legal in the UK?

CJC-1295 is not a licensed medicine in the UK. It can be supplied for in-vitro and laboratory research only, and must not be sold for human use. It is prohibited in sport under WADA rules. MyPep Biotech does not provide dosing guidance for humans or animals.

How Should CJC-1295 Be Stored?

Store freeze-dried vials in the fridge at 2–8°C, away from light
Mix with sterile bacteriostatic water and keep mixed vials refrigerated
Use our free peptide calculator to work out the concentration

CJC-1295 DAC vs No DAC: Frequently Asked Questions

Is CJC-1295 with DAC better than without DAC?

Neither is better overall. With DAC lasts for days and keeps GH raised; without DAC gives short, natural-style pulses. The right choice depends on the research question.

What is Modified GRF (1-29)?

It is another name for CJC-1295 without DAC: the first 29 amino acids of GHRH with four swaps for stability.

Does MyPep sell CJC-1295 with DAC?

No. MyPep Biotech supplies CJC-1295 without DAC, on its own and combined with Ipamorelin.

Why is CJC-1295 paired with Ipamorelin?

They act on two different receptors that both lead to GH release, so research suggests they produce a larger GH pulse together.

Do you give dosing advice?

No. Our products are for lab research only. We do not give dosing guidance for humans or animals.

What Is the Bottom Line on CJC-1295 DAC vs No DAC?

DAC is what makes the difference: with DAC, CJC-1295 lasts for days; without DAC, it gives short, natural-style pulses and is the version most often paired with Ipamorelin. In the UK, CJC-1295 is a research compound only.

Strictly for laboratory research use only. Not for human or veterinary use. This guide is for educational purposes and is not medical advice.

About the author: Raquel Whatmough founded MyPep Biotech, a UK research peptide supplier. Our guides use published scientific studies. Each one is checked for accuracy and UK rules.

Free Peptide Calculator UK

Working out reconstitution? Use our peptide calculator to find the bacteriostatic water volume, concentration per ml and pen clicks for any vial or pen strength.

Related research guides: CJC-1295 and Ipamorelin Guide · Ipamorelin UK Guide · Tesamorelin UK Guide · All Research Guides