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Your provider evaluates these considerations to determine a safe and appropriate amount
These include: Vegetarians and vegans, as vitamin B12 is mainly found in animal products Older adults, as they absorb vitamin B12 less well with age People with gastrointestinal disorders, like celiac disease or Crohns disease, which can block vitamin B12 absorption Those taking certain medications, such as proton pump inhibitors or metformin, which can also block vitamin B12 absorption Its best to talk to a healthcare professional about whether you need vitamin B12 supplements
Follow applicable research protocols and regulations
The problem is that the tablets that doctors can currently prescribe in the UK are nowhere near 1mg in strength, I believe they are 50mcg and the suggested dosage is 50-150 mcg taken between meals so for 150mcg you would take 3 tablets
These require MEAT documentation annually to survive RADV audits