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The synthetic versus natural distinction GHK-Cu exists naturally in human blood plasma, saliva, and urine
Supplementation should be gradual to lessen bloating and gas
Clinical trials suggest that supplements produce anti-melanogenic and anti-aging properties
Feng D, Shi X, Xiong Q, Zhang F, Li D, Wei W, et al
Obesity and type 2 diabetes mellitus: connections in epidemiology, pathogenesis, and treatments
Habib AM, Richards P, Cairns LS, Rogers GJ, Bannon CA, Parker HE, Morley TC, Yeo GS, Reimann F, and Gribble FM
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