If you have a BAC of .09, it will take you about six hours to return to a BAC of 0. You can't do anything to speed up the elimination of alcohol. The experienced drinker takes almost as long to eliminate alcohol as does the inexperienced drinker. If two people consume the same amount of alcohol, the individual with the greater blood volume will have a lower concentration of alcohol. Larger persons generally have a greater volume of blood in which alcohol can be distributed.
Muscle tissue contains larger amounts of blood than fatty tissue.
The more muscular or lean your body is, the greater volume of body water there is in which to distribute the alcohol you drink. When you also consider that women are generally smaller than men, the differences in BAC between men and women can be profound. Women should not assume that they have a lower BAC than a man simply because they have had fewer drinks. Some people suggest you limit your alcohol intake to one standard drink per hour. Unfortunately, this rule works only for the first few hours and generally only for men.