Nature’s Science Ketone Dietary Supplement Caplets, 60 Count. Nature’s Science KETO SLIM is formulated with our exclusive KETO PURE and MCT OIL POWDER to provide results. Nature’s Science KETO SLIM has isolated the fat-burning component in green tea that speeds up your metabolism. It is called KETO PURE and it has been shown in a published study to help overweight people lose up to 30lbs!* MCT OIL POWDER provides the body with healthy fats that can assist you with your ketogenic diet.* *In a study, participants who consumed a key ingredient in the Nature’s Science formulas twice daily lost an average of 30.5 pounds of weight vs. participants who only dieted (10.1 lbs.) in just 13 weeks. Both groups consumed a reduced calorie diet of 1350 Calories per day for women and 1850 Calories per day for men.