continue taking B12-fortified prenatal vitamins while nursing.
A long time ago, it was believed that vitamin B-12, folic acid (vitamin B-9), and vitamin B-6 could protect against heart and blood vessel diseases by reducing the levels of the an amino acid in the body (homocysteine).
Between 5 and 25 mcg of vitamin B12 are typically found in multivitamin/mineral pills [22].The levels of vitamin B12 for supplements which also contain other B-complex vitamins are typically 50–500 mcg higher, while in supplements that just contain vitamin B12, the levels are 500–1,000 mcg higher.
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