Good Housekeeping reports that despite many people believe the new drinking energy shots is healthy as it contains B vitamin, caffeine, and few calories, it might not be the case. Samantha Cassetty from Good Housekeeping Institute suggests that there is no added benefit by taking B vitamin since people are talking them from daily diet. Health experts also suggest 300 mg/day is the optimal caffeine consumption level but not all energy drinks reveal their caffeine amount on the labels. Natural diet and exercises would be the best way to gain energy. Natural coffee and teas are also healthy alternatives.