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However, scientific research shows that very high-dose oral B12 (1,000-2,000 mcg) can be effective for some, as about 1% can be absorbed without intrinsic factor
Re-ingestion allows for absorption of nutrients made available by bacterial fermentation, and also of vitamins and other nutrients synthesized by the gut bacteria, including vitamin B 12
Lifestyle: heavy alcohol use depletes B vitamins and can slow recovery
This is to avoid serious health issues
The specific lever it pulls inside the cell
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