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Acknowledgements We thank all who made contributions to the manuscript
None of this requires a crystal ball
Injections provide a direct and concentrated method of supplying the body with vitamin B12 and are of particular value to older populations when normal absorption rates decrease, even in the absence of pernicious anemia
Zero-order input means the absorption rate is constant for some defined period of time
Can the supplement industry do better with natural ingredients
Global, regional, and national burden of neurological disorders during 19902015: a systematic analysis for the Global Burden of Disease Study 2015
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