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There are side effects from taking Vitamin B12 supplements, like any supplement or tablet
a vitamin B12 level of below 200 400 pg/mL
Studies have shown that B-12 positively affects the brain, helping reduce stress and improve cognitive functioning
When taken orally, the B12 supplement must pass through the digestive tract, where it relies heavily on the presence of intrinsic factor, a protein in the stomach, to facilitate absorption
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