Sci Rep 6:3150
Safety Considerations and UK Regulatory Status Retatrutide is not MHRA-approved, meaning self-use outside clinical trials carries risks including product impurity, incorrect dosing, gastrointestinal adverse effects, and no pharmacovigilance oversight
Park J R, Lee H, Kim S I, et al
GlyHisLys(Cu) Peptide Sequence : GlyHisLys(Cu) Chemical Formula : CHNOCu (GHKCu complex) Molecular Weight : 401.91 g/mol CAS Number : 49557-75-7 Purity : Typically 99% (HPLC) for research use
Do not leave at room temperature
Pairs a GHRH analog with a ghrelin-mimetic GHRP, aiming to drive a stronger natural GH/IGF-1 pulse than either compound produces alone -- targeting muscle gain, fat loss, recovery, and sleep quality -- while GHRP-6 is specifically reported to add a pronounced appetite-stimulating effect useful for bulking (or, for some users, an unwanted side effect they'd rather avoid by switching to GHRP-2 or ipamorelin)