Great taste & clinically proven effective. The only fiber for regularity that won't cause excess gas. Great-tasting orange flavor. Citrucel's unique SmartFiber is smart because it is: The only fiber that won't ferment to cause excess gas like other fiber products (Based on laboratory testing. Individual results may vary); Clinically proven effective to help restore and maintain regularity; Gentle enough for every day use; 100% soluble, non-allergenic and gluten-free. Each heaping tablespoon contains: calcium (80 mg) and potassium (110 mg). Each heaping tablespoon contributes 60 calories from sucrose and maltodextrin.