How much alcohol a day?

What's "too much" alcohol for a person will vary, based on a number of factors. Thinking about the immediate effects of alcohol consumption, the extent to which alcohol impacts health and behavior is directly related to blood alcohol concentration (BAC). A person's BAC varies, depending on the amount of alcohol consumed and how quickly it's metabolized. Metabolism may be affected by such factors as body weight, amount of body fat, and sex. Females naturally have less of the enzyme necessary for alcohol to be broken down in the stomach, which causes more alcohol to go directly into the bloodstream before it is processed.