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REIGN (23 Flavors) Reviewed & Explained

Last Updated August 20, 2025

Complete Review of All (23 Flavors) REIGN Flavors


High-Caffeine Fitness Energy Drinks

In March 2019, a high-caffeine energy drink containing 300mg of caffeine was launched in the U.S. This fitness-oriented energy drink, a new brand from Monster Energy, entered the territory of Bang Energy, which rapidly expanded its share in the U.S. market.

The brand has since expanded into Canada and Europe, competing with the Bang series in markets outside the U.S.

In the U.S., the brand's promotion focuses more on hardcore fitness enthusiasts, including bodybuilders, Ironman athletes, and weightlifters. It has steadily gained recognition as a serious fitness energy drink brand. The brand has done a good job leveraging top icons from these worlds.

Not only in stores, but even in fitness-related venues in 2019 and 2020, it was clear that the brand was gaining momentum.

Three years after its release, the brand has expanded its flavor offerings and is now chasing after Bang, which is well ahead in this sector.