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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.
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To view a copy of this licence, visit About this article Cite this article Chang, L., Fang, W., Chen, B
Here are the key differences: Absorption and Effectiveness Injections: Directly enter the bloodstream, offering near 100% absorption
No concerning trends developed over time
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