Do energy shots really work? ?!

Question: Do energy shots really work!? !?
got some "fuel 7 hr energy shot" from cvs, and i was just wondering if they work, and if so, how well do they work!?

the one i have has:

4 calories
120 mg of vitamin c
30 mg of niacin
32 mg of vitamin B6
400 mcg of folic acid
and 200 mcg of vitamin B12

"fuel energy blend"
L-glycine N - acetyl-tyrosine
taurine N-acetly- cysteine
cafffein, malic acid

My boyfriend said that it made him feel like his body was asleep but his brain was awake!.
It made him feel kind of sick for some reason!.Www@FoodAQ@Com

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