For those who are able to drink moderately, some research indicates
that replacing other carbohydrates with alcohol causes weight loss,
and adding a moderate amount of alcohol to an adequate diet causes
little weight gain (Richard Mattes, Ph.D., R.D., of Purdue
University).
The above opinion, however, is not universally accepted. According
to two studies published in The American Journal of Clinical
Nutrition, individuals tend to overeat when they sit down to a
high-fat meal and wash it down with alcoholic drinks.
“The energy content of alcohol represents extra calories,” says Dr.
Angelo Tremblay, Ph.D. (of Laval University, Quebec, Canada), “thus
increasing total daily intake. This effect seems to add to the
over-feeding associated with a high-fat diet, increasing the
chances of weight gain.”
In any case, you should be more concerned about drunkenness, loss
of control, and liver damage.