GHRP-6
What it is
GHRP-6 (growth hormone-releasing peptide 6, also called growth hormone-releasing hexapeptide) is a synthetic six-amino-acid peptide first described in the 1980s. It belongs to the growth hormone secretagogue family and acts as an agonist at the ghrelin receptor, also known as the growth hormone secretagogue receptor (GHS-R1a).
Research context and categorization
GHRP-6 is generally grouped under the growth-hormone secretagogue category. Because it activates the same receptor that the natural hormone ghrelin uses, it is also discussed in relation to appetite, energy metabolism, and neuroendocrine signaling.
In the published literature it is most commonly discussed in relation to its ability to prompt pulsatile release of growth hormone through a pathway distinct from growth-hormone-releasing hormone (GHRH). It has been investigated in preclinical models in the context of appetite stimulation and cachexia (wasting states associated with cancer, chronic illness, and other conditions), and separately studied in the context of cytoprotective and cardioprotective mechanisms, such as reduced apoptosis and oxidative stress in ischemia-reperfusion injury models, along with tissue-repair and inflammatory processes. These uses are investigational. They come largely from cell, animal, and early-stage work, no large-scale human efficacy trials have been completed for any therapeutic indication, and none of these effects are confirmed or approved.
Status
- Regulatory status: Research-only. GHRP-6 is not FDA-approved for any indication and is treated as an investigational compound.
- Sport status: Prohibited under the WADA Prohibited List. It is classed under S2 (Peptide Hormones, Growth Factors, Related Substances, and Mimetics) as a growth-hormone secretagogue, and is banned at all times, both in-competition and out-of-competition.
Reconstitution notes (general)
GHRP-6 is typically supplied as a lyophilized (freeze-dried) powder that is reconstituted before use in research. Concentration is a simple ratio: concentration equals the milligrams of peptide in the vial divided by the millilitres of bacteriostatic water added. For example, 5 mg dissolved in 2.5 mL of bacteriostatic water gives 2 mg/mL. Adjusting the volume of water changes the resulting concentration, so the water added is chosen to reach a convenient working concentration. A reconstitution calculator is available at /pages/tools.
Dilution and handling notes (compound-specific)
GHRP-6 is a lyophilized peptide powder, so it does require reconstitution. Bacteriostatic water is the commonly used solvent because the benzyl alcohol preservative helps limit microbial growth over a multi-week refrigerated window, which suits a peptide that is measured out across several sessions. A frequently cited range is roughly 2 mL to 3 mL of bacteriostatic water per 5 mg of peptide, which keeps the concentration in an easy-to-measure band rather than an unusually dilute or highly concentrated one.
GHRP-6 generally dissolves readily and yields a clear, colorless solution, so it does not typically gel, cloud, or precipitate at the concentrations noted above. The practical handling quirk is mechanical rather than solubility-related: the peptide is sensitive to agitation, so the water is directed against the inner wall of the vial and the vial is swirled gently rather than shaken, since vigorous shaking can foam and stress the peptide. Allowing the vial to reach room temperature before adding water and giving it a short rest to fully dissolve are the usual steps. If the reconstituted solution ever looks cloudy or discolored, or shows floating particles, that is treated as a sign to discard it rather than force it into solution.
Handling and storage
Store reconstituted GHRP-6 refrigerated at 2 to 8 degrees Celsius, kept out of direct light. Wipe the stopper with an alcohol swab before drawing, and label the vial with the mix date. Reconstituted solution is generally considered usable for roughly a four-week refrigerated window. Discard the vial if the contents become cloudy or discolored or develop floaters. Unreconstituted powder is more stable and, for longer storage, is kept frozen.
Related reading
Tools and supplies
- Reconstitution & blend calculators
- Bacteriostatic Water 30 ml
- Gansulin Metal Reusable Pen
- 3 ml Glass Cartridges (10-pack)
- Complete Starter Kit
For laboratory and research reference only. Educational content, not medical, dosing, injection, or therapeutic guidance, and not intended for human or animal use. Any research uses described are investigational and not confirmed or approved benefits. Confirm anything involving health with a licensed professional. References linked above.