Karbolyn represents the dawn of a new era of carbohydrate supplementation. Derived from potato, rice, and corn, this fast-acting, long-lasting, high-performance compound offers the best of both simple and complex carbohydrates. Simple carbohydrates have the ability to enter the bloodstream quickly. However, they can also stimulate a strong 'spike' and subsequent 'crash' due to a rapid rise and fall of insulin levels. This may be good for a quick burst of energy but not for sustained endurance. Complex carbohydrates do provide sustained endurance. But, they are slow to digest, leaving you feeling bloated and lethargic.