The Best And Worst Pre Workout Supplements

  references
  
      National Institutes of Health: Dietary Supplements for Exercise and Athletic Performance
    
      Center for Science in the Public Interest: Caffeine Chart
    
      American Journal of Physiology: Effects of chronic dietary nitrate supplementation on the hemodynamic response to dynamic exercise
    
      Berkeley Wellness: Do B Vitamins Really Give You Energy?
    




Your pre-workout supplements can either help or hurt your health.

Image Credit: bernardbodo/iStock/GettyImages

Image Credit: bernardbodo/iStock/GettyImages

      National Institutes of Health: Dietary Supplements for Exercise and Athletic Performance
    
      Center for Science in the Public Interest: Caffeine Chart
    
      American Journal of Physiology: Effects of chronic dietary nitrate supplementation on the hemodynamic response to dynamic exercise
    
      Berkeley Wellness: Do B Vitamins Really Give You Energy?