{"product_id":"ghk-cu","title":"GHK-Cu","description":"\u003cp\u003eGHK-Cu, also known as copper tripeptide-1, is a naturally occurring tripeptide composed of the amino acids glycine, L-histidine, and L-lysine, complexed with a divalent copper ion (Cu²⁺). First identified in human plasma in the 1970s, it functions as a high-affinity copper-binding peptide and is found in saliva, urine, and other tissues. The peptide sequence (glycyl-L-histidyl-L-lysine) forms a stable complex with copper through coordination at the histidine residue and terminal amine groups, facilitating its biological activity. For the neutral 1:1 complex represented as C14H22CuN6O4, the calculated molecular weight is approximately 401.9 g\/mol, excluding counterions. Salt and coordination representations can differ: the linked GHK-Cu monoacetate reference is C14H22CuN6O4·C2H4O2, 462.0 g\/mol. CAS 49557-75-7 identifies the uncomplexed GHK peptide and should not be presented as a unique identifier for this supplied copper complex. \u003c\/p\u003e\u003cp\u003eAvailable individual vial sizes: 50mg, 100mg. Each purchase quantity refers to one individual vial, not a supplier box.\u003c\/p\u003e\u003cp\u003eChemical identifiers refer to the stated reference form; salt counterions can change formula weight. Follow the supplied material’s documentation for storage and handling. Cited research is not a batch analysis of this product.\u003c\/p\u003e\u003cp\u003eFor laboratory research use only. Not for human or animal use.\u003c\/p\u003e\u003ch3\u003eResearch and chemical references\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.caymanchem.com\/cdn\/insert\/28259.pdf\"\u003eGHK-Cu acetate reference; distinguishes complex and counterion mass\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.sigmaaldrich.com\/US\/en\/substance\/bbeglycyllhistidylllysine3403849557757\"\u003eUncomplexed GHK reference — CAS 49557-75-7\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/4349963\/\"\u003eOriginal GHK human-serum report (1973)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"The Rejuvenation Health Lab","offers":[{"title":"50mg","offer_id":44235005296676,"sku":"100018","price":44.0,"currency_code":"USD","in_stock":false},{"title":"100mg","offer_id":44235005329444,"sku":"100019","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0791\/7328\/7972\/files\/PepCard_GHK50.png?v=1789147630","url":"https:\/\/rejuvenationhealthlab.com\/products\/ghk-cu","provider":"The Rejuvenation Health Lab","version":"1.0","type":"link"}