These differences – 25% less body water than men, and less enzymes in their stomach and liver to break down alcohol in their system, means that alcohol goes through a woman’s system undiluted, and in higher concentrations. Research has shown given a man and a woman, both the same weight and physical condition, and given 3 standard drinks of alcohol in an hour – women consistently show a higher BAC level than the man. Women are often the designated drivers and if she consumes 2 or more standard drinks, she could show an elevated blood alcohol level of .08 and above.