Complex sentence: Within the limited amount of serious study on the subject, there is debate about whether a hangover may be prevented or at least mitigated; additionally, there is a vast body of folk medicine and simple quackery.
Split into simpler sentences: Within the limited amount of serious study on the subject, there is debate about whether a hangover may be prevented or at least mitigated. There is also a vast body of folk medicine and simple quackery.