Comment by dathinab

I wouldn't say "least".

technical there are many "non energy drinks" which have no less caffeine or other wake-up effects as energy drinks.

But funnily one of the ways Red Bull works is by giving you Vitamin B12 and Magnesium,

which are commonly on a slight deficit in, case where people take energy drinks. They can lead to a noticeable feeling of boosted energy in a similar time as caffeine takes effect (ironically Caffeine takes 15-30min to take effect, anything before is either something else or a placebo effect...). In general if you have problems with low energy in the morning taking B12+Magnesium alongside the breakfast is a things worth trying out (just maybe not by drinking a Red Bull :=) ).