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Still, it suggested the mechanism was working in humans, not just mice
At typical research doses of 2.5-5 mg per day, a single 50 mg vial will generally last between 10 to 20 days, depending on your daily dosing schedule (once or twice daily)
Repeat with a new vitamin patch the next day
Low mood, brain fog, poor memory, and difficulty concentrating are all common vitamin B12 deficiency symptoms
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