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GHK-Cu is a naturally occurring tripeptide that binds strongly to copper (II) ions

However, the effects may vary depending on individual factors such as baseline Carnitine levels, exercise intensity, and duration

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The energy-enhancing effects of a B12 shot can be different for each individual, depending on factors such as metabolism, the degree of B12 deficiency, and your unique health needs

doi: 10.1016/j.hbpd.2021.04.007 165 ZhangNYaoHZhangZLiZChenXZhaoYet al