Terranova vitamin b12 500mcg complex is a nutrient including stabilised rice bran and plant sources such as parsley leaf and dandelion leaf stabilised rice bran srb srb is a major nutritional source of b vitamins various active b vitamin metabolites and other nutrients that support the function andor bioavailability of b vitamins such as magnesium and zinc as well as nutrients often depleted during different types of stress such as potassium zinc and iron parsley leaf parsley provide