Growth Hormone Research Peptides
5 growth hormone research peptides are grouped here so readers can compare related compounds without losing the source context behind each profile. This category currently includes CJC-1295, Ipamorelin, GHRP-6, IGF-1 LR3, Sermorelin. Each profile links to a full research guide with mechanism notes, storage details, safety context, and citations where available.
The shared biology in this group centers on receptor signaling, tissue response, peptide stability, and translational research design. Some peptides in the category are supported by clinical literature, while others are limited to animal, in-vitro, or mechanistic research. That distinction matters. A peptide with human trial data should not be interpreted the same way as a compound with only early laboratory findings.
Researchers often use this category to compare outcomes related to mechanism mapping, safety observations, biomarker changes, and model-specific outcomes. The most useful starting point is usually the peptide with the clearest citation trail, followed by related compounds that act through a different receptor or pathway. This makes it easier to compare study design, model choice, and endpoint selection across a group rather than reviewing one peptide in isolation.
Researchers should review peptide-specific safety notes, study route, dose escalation, and model limitations before drawing conclusions. For purchasing research materials, review the vendor guidance on the buy peptides page. For protocol-style education, compare this category with the stacking guide before choosing which profile to read next.
Peptides in This Category
CJC-1295
CJC-1295 is a synthetic 29-amino-acid analog of growth hormone-releasing hormone (GHRH), originally developed by ConjuChem Biotechnologies. It stimulates the pituitary gland to release growth hormone in a dose-dependent manner. It comes in two forms: with DAC (Drug Affinity Complex), which uses a maleimidopropionic acid linker to bind the peptide to serum albumin and extend its half-life to roughly 8 days, and without DAC (also called Mod GRF 1-29), which has a half-life of about 30 minutes and produces sharper, more natural GH pulses.
Ipamorelin
Ipamorelin is a selective growth hormone secretagogue and ghrelin receptor agonist. It is known for producing a clean growth hormone release without significantly affecting cortisol or prolactin levels, making it one of the safest GH-releasing peptides.
GHRP-6
GHRP-6 is one of the first synthetic growth hormone releasing peptides. It strongly stimulates growth hormone release through the ghrelin receptor. It also notably increases appetite, which may be desirable or undesirable depending on research goals.
IGF-1 LR3
Native IGF-1 is incredible for tissue growth, but its half-life is a pathetic 10 to 20 minutes. Researchers fixed this by adding a 13-amino-acid extension to the N-terminus and swapping glutamic acid for arginine at position 3. The result is IGF-1 LR3, an 83-amino-acid beast that completely evades IGF-binding proteins. You get a half-life of 20 to 30 hours and roughly triple the biological potency of standard IGF-1.
Sermorelin
Sermorelin is the OG growth hormone secretagogue. Researchers back in the 1970s realized that out of the 44 amino acids making up natural Growth Hormone-Releasing Hormone (GHRH), only the first 29 are actually needed to stimulate the pituitary. That stripped-down 29-amino-acid fragment became Sermorelin. Frankly, it's older technology compared to modern analogs like CJC-1295, but it maintains a massive following in anti-aging circles because it triggers a completely natural, physiological pulse of growth hormone.