Dihydromyricetin (DHM) is a natural extract of the Oriental Raisin Tree. (Hovenia Dulcis) DHM has been used for centuries in traditional Chinese medicine as a hangover cure and intoxication blocker, but has just recently been the subject of focused research.Initial studies concluded that DHM supplements greatly reduces hangover symptoms and negates many of the negative side effects commonly associated with drunkenness such as slurred speech, loss of coordination, and lowered reaction time.