Monster Energy Drink Mega Green Regular, also known as Monster Original Green, is the flagship energy drink from Monster Beverage Corporation. It features a bold, sweet-and-salty citrus flavor that has become iconic among energy drink enthusiasts. providing a strong energy boost. The drink is carbonated and includes ingredients such as taurine, L-carnitine, ginseng, and B vitamins, which are commonly found in energy drinks. Its distinctive black can with green accents and the signature Monster claw marks make it easily recognizable.