The body is generally a very precise machine, each part working in harmony with the other. When someone undergoes any altercation to the “internal plumbing,” i.e. altering the size of one’s stomach or large intestine, there can be a myriad of consequences, including how alcohol is processed. Consequently, lap band or gastric bypass surgery certainly does affect one’s BAC in a DUI but how? Click on the following link to find out.