Energy drinks are the beverage of choice for the 1 younger generation. A classical type of energy drink has a composition of water, sugar, caffeine in variable quantity, some bioactive compounds like guarana, glucoronolactone, and taurine, different types of 2 vitamin B like niacin, pantothenic acid, and cobalamin. Caffeine is a commonly consumed phytochemical, utilized both pharmacologically as well as industrially in beverage manufacturing. It is a centrally-acting stimulant affecting the nervous system by antagonizing 3 the adenosine receptors. It enhances the mental alertness and delays the feeling of fatigability when consumed in an energy drink, which possibly justifies its 4 role in these beverages. The glucose component in energy-enhancing beverages is usually responsible for providing a substrate required for physiological energy. They are also associated with the effects of the autonomic nervous system. There is strong evidence of a significant increase in both the pulse rate as well as