These gender differences occur for several reasons. On average, women weigh less than men, and smaller people reach higher blood-alcohol levels than larger people. In addition, kilogram for kilogram, women have less water in their bodies than men do—even if a woman and a man of the same weight drink an equal amount of alcohol, the woman’s blood-alcohol concentration will be higher. Thirdly, women have less alcohol-metabolizing enzymes and digest alcohol in their stomach differently than men.
The guidelines are a starting place for women to assess their individual drinking practices.
You may wish to refer your patients to: