the acidity of soda and most energy drinks can also cause problems, including tooth decay.
moderation is key...occasional is fine. for daily 'boosts'...coffee or caffine pills, but don't overdo those either.
the nurses my wife work with say all the low carb energy drinks taste like neo-natal vitamins...which sounds aweful.
i'll pound back an orange rock star once or twice a month IF i really need a pick me up.