Feeling unusually tired, foggy, or irritable despite a “normal” Vitamin B12 report can be frustrating, and doctors say it is far more common than most people realise. In a video shared on Instagram by ...

Vitamin B12 is important for the health of your nervous system and your red blood cells. It can be found in many animal products and fortified foods. In the United States, about 6% of people under age ...

Vitamin B12 deficiency can result in a host of symptoms, ranging from fatigue and brain fog to irritability and pins and needles. Despite having a normal B12 test result, some individuals may still ...