They are all around you.

The young business professional, yoga instructor and soccer mom all have one thing in common: a drinking problem.

So, who really meets the medical definition of an alcoholic?

David Sack, MD, board certified in Psychiatry, Addiction Psychiatry and Addiction Medicine, reports that nearly one million American women are binge drinkers; and they aren’t just sorority girls.

The more educated and well off women are, the more likely they are to imbibe, found a Gallup poll from 2010. Another study published in 2010 found that white women were more likely to drink than women of other racial backgrounds, though the rates for Latina and black women were rising.

Many women rationalize their over-consumption, since red wine, in moderation, has been discovered to have some heart health benefits.

According to the Mayo Clinic, antioxidants in red wine called polyphenols may help protect the lining of blood vessels in your heart. A polyphenol called resveratrol is one substance in red wine that's gotten attention, because it can help prevent damage to blood vessels, reduces "bad" cholesterol and prevents blood clots.

Dr. Sack, MD, discusses women and binge drinking and the science behind alcohol consumption.