Diet Mountain Dew®. Low calorie dew®. 0 Calories per 12 fl oz serving. 2 l (2.1 qt). Sugar free. Very low sodium, 35mg or less per 240 ml (8 fl oz). Caffeine content: 54mg/12 fl oz. Please recycle. Product Questions Call: 1-800-433-2652. www.mountaindew.com.