Pure Nutrition Vitamin B12 contains the highest dose of Vitamin B12 in the most absorbable form, which is Methylcobalamin. Vitamin B12 supplement is important for brain health and cognitive functions. The vitamin plays a major role in RBC production and hence low levels of Vitamin B12 can cause Megaloblastic Anemia. Hence Pure Nutrition B12 Plant based supplement, helps prevent the clinical symptoms of Megaloblastic Anemia such as weakness and fatigue.