Reign Storm energy drink contains 200 mg of plant-based caffeine per 12 fl oz (355 ml) can. The caffeine is derived from natural sources such as green coffee beans, green tea extract, ginseng, guarana, and guayusa

. Note that caffeine content may vary slightly depending on the country, but the standard amount for Reign Storm is 200 mg per can in most markets outside the U.S., where some Reign products may have higher caffeine levels