Yeast Nutritional Bio (High in Vitamin B12), is a powdered food based on inactive yeast (Saccharomyces cerevisiae) with vitamin B12. It is an organic food with a high content of fibre and vitamin B12 and contributes to normal energy metabolism. Helps the normal functioning of the nervous system. Helps normal homocysteine metabolism. Contributes to normal psychological function. Contributes to normal red blood cell formation. Supports normal immune system function. Reduces tiredness and fatigue. plays a role in the process of cell division.