• Glycerol is a very effective osmolyte, though it needs to be consumed in rather large quantities to provide its dehydration benefits. It is unknown whether ingesting glycerol beverages or simply consuming an electrolyte solution regularly during exercise is more effective at preventing dehydration. One must be careful when using glycerol, however, because it alters the body’s natural water balance and can leave a person dangerously hyperhydrated or dehydrated.
  • Guarana is essentially caffeine, though this may not be stated on the label of products such as energy drinks. The authors of this article advise caution when ingesting guarana with additional caffeine, for fear of an overdose.
  • Hydroxycut, though ubiquitously advertised to provide pharmacological effects, does not have to adhere to the same standards as pharmaceuticals since it is labeled a “supplement”. Further research is needed to better understand the safety and efficacy of Hydroxycut.