GU Energy Gel provides athletes with a dose of 100 calories to deliver high-quality, easily-digested and long-lasting energy for athletes in every sport and at all levels. Everything inside each packet of GU is engineered to do one simple thing: provide your body with the essential nutrition it needs to keep going for miles and miles and hours and hours. It goes down easy, and it goes to work fast so you don't have to slow down. Comes in a pack of 8.What's in it? Carbohydrates - GU provides athletes with a dose of 100 calories in the form of 70-80% maltodextrin and 30-20% fructose (The ratio depends upon the flavor.). Why the mix? It's a complex carbohydrate, and studies have shown that some complex carbs are actually digested faster than simple sugars like table sugar and honey. Amino Acid Blend - GU features a unique blend of amino acids to combat muscle fatigue, accelerate the conversion of carbohydrates into usable energy, and maintain mental focus. Electrolytes - Sodium and potassium to replenish what is lost during strenuous activity. Caffeine - Some GU flavors are caffeinated while others are not. GU adds caffeine for two reasons: It acts as a stimulant and it lowers the perceived effort. How's it different?An optimal blend of carbohydrates, the proprietary GU amino blend, and a full serving of Vitamin C & E. Oh yeah, did GU mention taste? GU Energy Gel has the time-tested consistency and delicious taste that athletes have come to expect from the original energy gel.How do I use it?GU should be consumed 15 minutes before and then every 45 minutes thereafter.Style number 190