RxSugar® Is The World’s Best Tasting, Plant-based, Non-GMO Project Verified, Keto Certified Sugar Zero Calories Zero Net Carbs Zero Aftertaste Zero Artificial Sweeteners Zero Artificial Ingredients Zero Sugar Alcohols RxSugar®. There Is No Substitute.™Non-GMO Project Verified RxSugar® is made from Allulose, a low calorie plant-based sugar, is different from other sugars in that it is not metabolized by the human body in the same way as table sugar. RxSugar® does not affect your blood sugar levels. Allulose, is proven to have zero net carbohydrate impact; this is why the Allulose carbohydrates are subtracted from the Total Carbs to produce zero net carbohydrates.