Energy drinks faulted for not disclosing excessive caffeine

Two-thirds of the energy drink brands on the market do not disclose their caffeine content and of the ones that do so, some ignore the threshold for what is considered excessive, researchers at GoodGuide.com found.

Venom, Monster, 5-Hour Energy, Ammo, FRS, and Red Bull Cola all keep hush about the amount of caffeine they put in their drinks, according to GoodGuide, which ranks consumer products according to their impact on health and the environment.