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Daily injection compliance matters: GHK-Cu requires daily subcutaneous injection, which is not the right fit for patients who only want to inject their GLP-1 once a week
Topical serums produce localized surface-level effects in the skin layers they penetrate, which is limited by the skin barrier
Its best used as part of a broader approach, including lifestyle changes, dietary adjustments, and, if necessary, medication
This means they could affect the absorption of vitamin B12, which can potentially lead to vitamin B12 deficiency or worsen it in someone who already has it
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