According to the National Federation of State High School Associations, high carbohydrate and caffeine content in energy drinks can lead to gastrointestinal upset, including diarrhea. read more
Labeled an energy blend by the company, this mixture of herbs and stimulants constitutes 2,500 milligrams in a single serving of Monster Energy Drink. Diarrhea Explained Diarrhea, according to the National Institute of Diabetes and Digestive and Kidney Diseases, is the experience of loose and watery stools at least three times a day. read more
According to an article written by a doctor, it is the amount of caffeine and/or carbohydrates in the drink. (I don't know the quantity of caffeine or carbohydrates in the energy drink. read more
Many ingredients in energy drinks can cause diarrhea; different people have different sensitivities, so it’s hard to say which one actually causes it in any individual. According to sports physicians I've talked to, the best energy drink is water. read more