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For patients without absorption disorders, high-dose oral supplements of 1,000 to 2,000 mcg daily have been shown to be comparably effective at correcting mild to moderate deficiency at lower cost and greater convenience.
Batch vials left Research cited from peer-reviewed sources PubMed NEJM JAMA Cochrane Lab quality that actually matters
It promotes neurological health and may reduce discomfort associated with Parkinson's disease
92163214 to X.J., No
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