 Red Bull Simply Cola is flavored with plant extracts, including galangal, vanilla, mustard seed, lime, kola nut, cocoa, liquorice, cinnamon, lemon, ginger, coca leaf, orange, corn mint, pine, cardamom, mace, clove, and lemon juice concentrate.It also contains caffeine from coffee beans; at 45 milligrams per 355ml (12-ounce) can, the caffeine level is regulated by the FDA, it contains more than Coca-Cola (34 mg) or Pepsi-Cola (37.5 mg), but less than Diet Coke (47 mg) or Mountain Dew (54 mg).The cola contains significantly less caffeine than Red Bull's eponymous energy drink (80 mg per 250 mL).