Vitamins B 15 & B 12 Product Description: Vitamin B12 stimulates red blood cell production for better transportation of Oxygen to blood and muscle tissue. Vitamin B15 stimulates brain activity, enhancing alertness. Fortifies muscle mass, reduces fatigue and aids recuperation. Benefits of B-15 & B-12: Helps to stimulate immune system DMG helps the body use oxygen more efficiently Vitamin B12 is a nutrient that helps keep the body's nerve and blood cells healthy Safe for adult roosters.