Thirteen deaths have been reported to the Food and Drug Administration as `` adverse events '' after the consumption of the dietary supplement 5-hour ENERGY , according to an FDA statement . While anyone can report an adverse event , and although no cause-and-effect relationship has been established , the FDA said it is investigating , as is required by law . A report does not mean a product is responsible for or that it contributed to any health issue . `` If we find a relationship between consumption of the product and harm , FDA will take appropriate action to reduce or eliminate the risk , '' the FDA said . `` While the FDA investigates all reports to the best of its ability , it does not always have access to all the information needed to conclusively determine the cause of the event . '' As a dietary supplement , 5-hour ENERGY is not required to disclose the amount of caffeine in its 2-ounce `` energy shot . '' Instead , the 5-hour ENERGY label lists 1,870 milligrams of an `` Energy Blend , '' which includes caffeine , taurine and other ingredients . A ConsumerLab.com analysis found about 207 milligrams of caffeine in one 5-hour ENERGY . Red Bull , by comparison , contains about 80 milligrams of caffeine in an 8.4-ounce can , while a 16-ounce grande Starbucks Pike Place brewed coffee contains about 330 milligrams of caffeine . The distributor of 5-hour ENERGY , Living Essentials LLC , said in a statement : `` We recommend on product labels and the 5-hour ENERGY website that individuals consume no more than two bottles of 5-hour ENERGY shots per day , spaced several hours apart . Consumers who have caffeine sensitivities should consult with a physician before taking and can consider the 'decaf ' version . '' Last month , the parents of Anais Fournier , 14 , filed a lawsuit alleging that she died after drinking two Monster Energy drinks in a 24-hour period . In her case , an underlying heart condition was complicated by caffeine toxicity , according to the death certificate . Whether the 13 deaths preliminarily linked to 5-Hour ENERGY were similarly complicated by other medical conditions is under investigation . In addition to the deaths , there have been a total of 92 patient reports , including 33 hospitalizations , reported as 5-Hour ENERGY adverse events , according to the FDA .
FDA : No deaths have been preliminarily linked to 5-hour ENERGY supplement . No cause - and - effect relationship has been established , according to the FDA . The company is not required to report the presence of mercury in its ` ` energy shot ''