Watch Dr. Gupta talk about the the safety of 5-hour Energy » . ' Energy provides energy , alertness without sleep to fatigued Americans . Each drink contains caffeine , high doses of B vitamins , and ` ` energy blend '' Note : No knowledge of how the ingredients react together .
' Energy provides energy , alertness without sleep to fatigued Americans . Each drink contains caffeine , high doses of B vitamins , and ` ` energy blend '' Note : No knowledge of how the ingredients react together .