Growth Hormone Research Peptides

Peptides for growth hormone axis research

This collection brings together the growth hormone secretagogues and releasing peptides that researchers use to study how growth hormone (GH) release is signalled and regulated. It covers both receptor pathways that drive GH release, GHRH analogues and ghrelin-receptor agonists, alongside related compounds that act further along the axis. Every product is a lyophilised research material, supplied strictly for laboratory work. When choosing between them, researchers mainly weigh which receptor a compound acts on, how long it remains active in a given model, and whether a single compound or a combination fits the study design. Each product page lists the vial sizes available, and our reconstitution calculator helps with solvent volumes.

GHRH analogues: Tesamorelin and CJC-1295

Tesamorelin and CJC-1295 are synthetic analogues of growth hormone-releasing hormone (GHRH), the hypothalamic signal that acts on the GHRH receptor. CJC-1295 comes in two forms. With DAC (Drug Affinity Complex), the peptide carries a linker that binds serum albumin, which extends its half-life considerably in published studies. Without DAC, also known as Modified GRF (1-29), it is the shorter-acting form. CJC-1295 without DAC is also available combined with Ipamorelin as a research blend.

Ghrelin-receptor agonists and related compounds

Ipamorelin, GHRP-2, GHRP-6 and Hexarelin act on the growth hormone secretagogue receptor (GHS-R1a), the receptor for the hormone ghrelin. Ipamorelin is a pentapeptide noted in the literature for its selectivity, while GHRP-2, GHRP-6 and Hexarelin are hexapeptides with broader activity profiles. The collection is completed by Kisspeptin, which regulates the reproductive hormone axis, and by the growth factor analogues IGF-1 LR3 and PEG-MGF, which sit downstream of GH.

Tested, documented and shipped from the Netherlands

Batches are analysed by Janoshik, an independent laboratory, for identity and purity. Published reports are on our Lab Results page, and the certificate of analysis for any other batch is available on request. Keep lyophilised vials cold, dry and away from light, and refrigerate them once reconstituted.

Orders placed Monday to Saturday usually leave us within 24 hours of payment. Delivery takes 1 to 2 working days to the Netherlands and Belgium and 3 to 8 working days to the rest of Europe, and orders over €150 ship free. All products are for laboratory research use only and are not for human consumption.

Growth hormone research peptides: FAQ

What is the difference between CJC-1295 with DAC and without DAC?

Both are GHRH analogues. The DAC version carries a Drug Affinity Complex that binds serum albumin, which gives it a much longer half-life in published studies. The version without DAC, also called Modified GRF (1-29), is cleared far more quickly, so the two suit different study designs.

What is the difference between Ipamorelin and GHRP-6?

Both are ghrelin-receptor (GHS-R1a) agonists. Ipamorelin is a pentapeptide described in the literature as highly selective for growth hormone release, while GHRP-6 is a hexapeptide that also shows ghrelin-like effects on appetite signalling in animal studies.

Why is CJC-1295 combined with Ipamorelin?

The two act on different receptors: CJC-1295 on the GHRH receptor and Ipamorelin on the ghrelin receptor. Researchers studying how the two pathways interact often use them together, so we supply them as a pre-measured blend as well as separately.

Is IGF-1 LR3 a growth hormone secretagogue?

No. IGF-1 LR3 is an analogue of insulin-like growth factor 1, which sits downstream of growth hormone. Its modified sequence reduces binding to IGF-binding proteins, which is why it is widely used in cell culture research.

How do I get the certificate of analysis for my batch?

Published Janoshik reports are listed on our Lab Results page, with batch numbers and keys you can verify on Janoshik's own site. For a batch that is not listed, contact us with your order number and we will send the certificate.

Are these peptides suitable for human use?

No. Every product in this collection is sold strictly for in-vitro and laboratory research. They are not medicines, are not for human or veterinary use, and we cannot give dosing or usage advice.