Fast Twitch Nitric Oxide Energy Supplement has less than 1g of Carbs and is sugar-free. It packs 1.7 grams of our Energy Amplifying Matrix that includes Taurine Glucuronolactone plus 200mg of energy boosting caffeine. Product Container 12 - 16.9 fl oz. (500 ml.) Bottles Flavor - Grape Ingredients Purified Water Citric Acid Malic Acid Natural Flavors Guar Gum Fruit and Vegetable Juices (Added for Color) Acesulfame Potassium Sucralose Blue 1. Directions/Use Refrigerate after opening. Warnings Limit the use of caffeine-containing medications foods or beverages while taking this product because too much caffeine may cause nervousness irritability sleeplessness and occasionally rapid heartbeat.