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Other people needing shots include those who have had gastrointestinal surgery if their digestive system cannot absorb vitamin B12 efficiently
These ranges come from animal studies and informal reports
Heat exposure: Do not leave the vial at room temperature longer than necessary for handling
Similarly, although hepatic dysfunction can occur with large niacin doses (1-3 grams daily over months) causing elevated liver enzymes or jaundice, niacinamide at 100 mg is very unlikely to have any adverse effect on the liver
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