What would evolve if i took a 7 hour shot of liveliness up to that time an exam?

The energy drink I'm taking is called 7 hour energy. It have 120mg of Vitamin C, 30 mg Niacin, 32 mg Vitamin B6, 400mcg Folic Acid, and 200mcg Vitamin b12. What would happen if I take this about an hour previously the test? Will anything bad happen?
Answers:
It will over- caffeinate you big time. Don't do it, you'll be a disconcerted wreck!

However- anything with Ginseng in it has be shown to improve concentration and has no stimulants to make you apprehensive.
It's also crammed with caffeine, which will make you jittery and anxious. The other ingredients won't do a damn thing for you - so don't put yourself through that!

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