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In certain studies, vitamin B12 has been found to improve the symptoms for those who are struggling with depression
Since the body cannot produce B12 on its own, obtaining an adequate amount through diet or supplementation is essential
Excess B12 from oral supplements is poorly absorbed at high doses (the body absorbs roughly 1 to 2% of a 1,000 mcg oral dose) and the remainder is excreted in urine
Guidelines for the diagnosis and treatment of cobalamin and folate disorders
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