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Low levels of Vitamin B12 are rare in most healthy adults because the human liver stores it over time
Effective in reducing dark spots, hyperpigmentation, and melasma
Individual tolerance varies some may gradually increase to 500750 mcg/day, but caution is advised
High doses of B12, often used to treat deficiencies, may cause side effects such as headaches, nausea, diarrhea, fatigue or weakness, and tingling in the hands and feet
The compound is supplied as a lyophilized blue-tinted powder in a sealed amber-glass vial under inert gas
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