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These include: Metformin (used for diabetes or PCOS) Proton Pump Inhibitors (used for acid reflux or GERD) H2 Blockers Birth control pills Certain antibiotics If youre taking these medications long-term, particularly in combination, regular B12 injections might be beneficial

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For example, hydration-supporting ingredients such as hyaluronic acid or glycerin often appear alongside copper peptides to maintain moisture balance within the skin

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At four weeks, the melanin indices decreased consistently at all six sites in the glutathione group