The molecule responsible for hangovers is ethanol, which we colloquially refer to as alcohol. Ethanol is present in all alcoholic beverages, and generally speaking, the more ethanol, the greater the potential for a hangover. So, how exactly does alcohol cause a hangover -- and is there any way to prevent one? Judy Grisel explores the surprising ways that alcohol affects the body. This was originally an animated TED-Ed lesson. It was directed by Anton Bogaty and narrated by Alexandra Panzer, with music by Jarrett Farkas. After the lesson, our host Shoshana dives deeper into the effects of drinking alcohol and the specific impact it may have on women's health.