Nature’s Best Perfect Low Carb Isopure Dutch Chocolate Description Protein Supplement with Great Tasting Dutch Chocolate Flavor Lactose Free Fat Free. 0 grams of Sugar. Nature’s Best Perfect Low Carb Isopure contains 50 grams of 100% Ion Exchange Whey Protein Isolate. Any and all impurities typically found in most whey proteins have been removed to provide you with a great tasting, lactose free, glutamine enriched, state of the art low carbohydrate protein supplement.