Adverse reactions: mild transient diarrhea, polycythemia vera, peripheral vascular thrombosis, transient rash itching, bloating sensation
[79] Animal-derived foods [edit] Animals store vitamin B 12 from their diets in their livers and muscles and some pass the vitamin into their eggs and milk
At 8mg per week: Draw 1.6mL = 160 units
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Proton pump inhibitors (acid blockers) and over-the-counter non-steroidal anti-inflammatory agents can change the environment of the GI tract predisposing to nutrient deficiencies Unfortunately, that isnt an exhaustive list, but it does give you a pretty good idea of why you should be concerned about your vitamin B12 levels
The dosing chart in units pre-calculates common scenarios, but knowing the formulas means you can verify any number and calculate custom doses that fall outside standard tables