Sustained Natural Energy. No Artificial Colors. No Artificial Flavors. 1000mcg. Tropical Blast: Natural Mango, Passion Fruit and Papaya Flavor with Other Natural Flavors. Vitamin B-12, The Energy Vitamin, Is A Natural Energy Source. It Is Essential For Many Functions Within The Body And Vital For Maintaining Optimum Health. Data Has Shown That Low Levels Of B-12 Can Cause: Anemia. Loss of Balance. Numbness or Tingling. Weakness. Lack of Energy.