PMID 17474166
according to the National Academies of Sciences, Engineering, and Medicine, absorption is approximately 50% at 1 mcg but falls to roughly 1.3% at 1,000 mcg
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Not for human or animal use, consumption, diagnosis, treatment, food, supplement, cosmetic, veterinary, or similar end use.
It is also particularly valuable for patients who may have issues with their digestive system that may make other forms of increasing their B12 levels, such as pills and food, less effective
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