Naturally flavored with other natural flavors. No artificial flavors. 10 calories per bottle. More vitamins B, C & E than regular propel. 100% Daily value of vitamins B3, B5, B6, C and E. Per 20 fl oz Serving: Regular Propel: Niacin (B3) (80% DV); Vitamin B6 (70% DV); Pantothenic Acid (B5) (120% DV); Vitamin C (35% DV); Vitamin E (20% DV). Propel Vitamin Boost: Niacin (B3) (100% DV); Vitamin B6 (100% DV); Pantothenic Acid (B5) (130% DV); Vitamin C (100% DV); Vitamin E (100% DV). No artificial sweeteners. From the makers of Gatorade. Gatorade level of electrolytes. Comments? 1-877-3-Propel; propelwater.com.