[10] Vitamin B is an essential nutrient for fetal development, and untreated B deficiency in a pregnant woman can lead to serious neurological damage in the infant
It helps make your red blood cells and DNA
Large doses of folic acid may also partially mask or worsen vitamin B deficiency by correcting anemia while allowing neurological damage to progress
For others, it might take a few weeks of consistent injections before you notice a change if your symptoms are more complicated, such as numbness, exhaustion, or memory problems
Consult your physician if you have Lebers optic neuropathy, polycythemia, gout, iron or folic acid deficiency anemia or hypokalemia
Adults can completely fail to absorb the vitamin administered orally