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Serious vitamin B12 deficiency may result in anemia, stomach problems, and nerve damage
In contrast, injections avoid these barriers entirely
Gelotte CK, Zimmerman BA (2015): Pharmacokinetics, Safety, and Cardiovascular Tolerability of Phenylephrine HCl 10, 20, and 30 mg After a Single Oral Administration in Healthy Volunteers
BMJ (Clinical research ed.)
A 2.5mg dose at this concentration requires 75 units instead of 50
B-12 for energy and wellness is not about quick fixes
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