Nature's Plus Vitamin B-12 500 mcg. - 90 Tablets Nature's Plus Vitamin B-12 supplies a precise daily measure of Vitamin B-12 (as cyanocobalamin). Vitamin B-12 has a broad range of physiological roles and benefits, but is best known for its part in the nutritional support of red blood cells. Nature's Plus is committed to offering the best supplements available anywhere. Free from artificial colors and preservatives Free from the common allergens yeast, wheat, soy, and milk.