This is from the net:
Energy drinks like Monster Energy, Rockstar, Red Bull and others contain potentially dangerous levels of caffeine and other stimulants, such as guarana and taurine.
They forgot to mention STROKE which can leave a person completely paralyzed, has v sholom. That is on other websites.
The menahel should convene a meeting, give out the medical evidence printed out to everone, say the drinks are prohibited, and suggest as an alternative – water with sugar dissolved in it (but not for diabetics) in a plastic bottle from home to re-hydrate and get a little burst of energy with the sugar.