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What Happens When You Inject in the Wrong Place Two scenarios show why injection site matters as much as dose

While generally considered safe, use during pregnancy and breastfeeding should be discussed with a doctor

Jastreboff, A
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In contrast, in generally well-nourished populations where flour is fortified with folic acid (which is now a widespread global practice), B12 deficiency may be the main cause of elevated tHcy (253)