We don’t have to get too fancy, though! Conventional calorie-free drinks like Diet Coke, Coke Zero, and Diet Pepsi are all acceptable keto-friendly. Sparkling water like Perrier, La Croix, and Bubly are all excellent alternatives, and they don’t use artificial sweeteners. How many calories are in a can of Dr Pepper Zero? Does sugar-free soda raise blood sugar?ĭiet Dr Pepper (12 fluid ounce) contains 0.4g total carbs, 0.4g net carbs, 0g fat, 0.4g protein, and 4 calories.How many calories are in a can of Dr Pepper Zero?.Does Diet Dr Pepper have sugar or carbs?.