The two most noticeable flavors of Nos Energy are orange and passion-fruit. The flavor tasted similar to orange fruit drinks but with a mild-stale aftertaste. Its yellow energy juice is carbonated and powered by taurine, L-carnitine, caffeine, sugar, inositol, panax ginseng and B-vitamins. The energy rush from Nos Energy was above average and there were no major side effects. However, I did experience minor side effects, such as light headaches and stomachaches. If you drink Nos Energy on an empty stomach, its energy rush and side effects may be more intensify
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