According to a study released today Rhode Island and Massachusetts researchers found that regardless of the color of liquor consumed the level of brain impairment was the same.

“After the alcohol leaves the system people will be impaired next morning," Dr Damaris Rohsenow of the Brown University Center for Alcohol and Addiction Studies in Providence.

Dr Marc Galanter , a professor of psychiatry at New York University School of Medicine in New York City, agrees that drinking too much is the root cause of a hangover.

To approximate the effects of drinking on an empty stomach, Rohsenow and colleagues conducted a test on 95 young adults between the ages of 21 and 33. They were given standardized meal three hours before the test liquids were given until subjects reached a minimum blood alcohol level of 0.09 grams percent. (In all 50 states, 0.08 grams percent is considered legally drunk.)

Rohsenow told Reuters Health, "It's likely that the hangover probably lifts within a few hours but level of impairment can not be judged."

New research also stated that dark liquors had more toxic properties that incited more severe hangovers than lighter ones as vodka.

The reason given by researchers was the materials used in the alcohol fermenting process like grains and wood casks produced small amounts of toxic byproducts.

"The most important thing for people to realize is that if you're feeling hungover, you're probably impaired in terms of performing tasks that require vigilance and making quick decisions,” cautioned Rohsenow.