Do you wake up feeling drained despite getting 9 hours of sleep? Maybe your body is lacking in vitamin B12. This essential ...

However, that number jumps to 2.6 mcg if you’re pregnant and 2.8 mcg if you’re breastfeeding ... According to the NIH, our ...

such as 500 mcg or 1,000 mcg, but because your body absorbs only a small percentage, those doses are considered safe. A prescription form of vitamin B12 can be given as an injection, notes the NIH ...