The poll of 1000 slimmers carried out by Forza Supplements has found that four out of ten consume 1,000 calories in alcohol on just one night out, News.com.au reported.
It was found that more than 50 percent of the respondents said boozing made them hungrier, while four in five said it lowered their willpower, causing them to indulge in junk food.
The company's Lee Smith said the key to successful dieting is cutting out alcohol.
He said studies showed that alcohol increases your appetite by suppressing leptin, the hormone which normally tells your brain to stop eating, but it also negatively effects many other brain chemicals that are involved in appetite suppression.
Smith asserted that the other really damaging thing is that as few as two standard alcoholic drinks can slow down your body's fat-burning process by a whopping 73 percent.