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Can You Take Too Much B12
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Most multivitamin supplements contain between 2.5 and 25 g of B12, which is well above the RNI but considered safe due to the vitamin's low toxicity profile
This is because vitamin B12 is absorbed by first combining it with a protein called intrinsic factor produced in the stomach, then the B12 has to travel down the small intestine to an area called ileum for it to be absorbed properly
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