Vitamin B12 is an essential nutrient that must be obtained through diet or a supplement. Having too little B12 can cause fatigue, anemia, and neurological problems. Vitamin deficiencies may sometimes ...

B12 is a vitamin that helps to maintain essential systems, such as the central nervous system. A B12 deficiency in females can cause symptoms such as fatigue, tingling feet, or depression. The ...

Signs of a vitamin deficiency vary by the vitamin and severity of the deficiency. Symptoms can occur in the neurological, cardiovascular, and gastrointestinal systems. Vitamins help the body grow and ...