CJC-1295 / Ipamorelin

Key points

• The blend pairs CJC-1295, which mimics a hormone that tells the pituitary gland to release growth hormone, with ipamorelin, which nudges the same gland through a second route.
• Working on two pathways is meant to produce a larger, more natural pulse of growth hormone than either peptide alone.
• Most of the evidence looks at each peptide separately and measures hormone levels, not long term health outcomes.
• In the UK neither is a licensed medicine, and both are on the WADA Prohibited List.

Quick facts

What it is

A blend of two growth hormone peptides

Components

CJC-1295 (GHRH analogue) and ipamorelin (GH secretagogue)

UK status

Not a licensed medicine; sold for research use

Human evidence

Limited; short term hormone studies of each peptide

In sport

On the WADA Prohibited List

How it works

Growth hormone is released from the pituitary gland in pulses. CJC-1295 acts like growth hormone releasing hormone, the body's own signal to produce more. Ipamorelin works through a separate receptor that also encourages release, while being fairly selective, so it has less effect on other hormones. Combining the two is meant to give a stronger, cleaner pulse. The reasoning is sound in principle, but most of the marketing rests on this mechanism rather than on trials that follow people over time.

What the evidence shows

Each peptide has been studied on its own, and the research shows they can raise growth hormone and IGF-1 in the short term. What is missing is good evidence for the combination, and for the outcomes people actually care about, such as changes in body composition, recovery or wellbeing over months. No large controlled trial of the blend has been published, so its real world benefit is still an open question.

What it does not settle

• There is little trial evidence for the blend as sold, as opposed to each peptide on its own.
• Studies tend to measure hormone levels rather than long term health or body composition.
• Long term safety is not established, and blends vary in what they actually contain.

Side effects

Common

• Reported effects, mostly from anecdote and small studies, include water retention, aching joints, tingling in the hands, flushing, vivid dreams and reactions at the injection site.
• Raising growth hormone can also affect blood sugar, which is worth bearing in mind.

Less common but serious

• Because products are bought from unregulated sellers, the dose, purity and contents are uncertain.
• Growth hormone deficiency is a medical diagnosis, and raising the hormone without a clinical need carries its own risks.

Report any suspected side effect through the MHRA Yellow Card scheme.

UK legal status and access

This blend has no UK marketing authorisation, so it is not a licensed medicine and is not offered by registered clinics or pharmacies. It is usually sold online labelled for research use. Genuine growth hormone deficiency is diagnosed with blood tests and treated with licensed medicines under specialist care.

Common questions