Whether you are charged with a DUI is commonly determined by your blood alcohol content (or BAC). But what does that mean? Because alcohol is eliminated from the bloodstream at a fairly steady rate, the degree of intoxication depends a lot on the rate of absorption. If alcohol is absorbed rapidly into the bloodstream, the blood alcohol level will get high fast—and so will you. If it is absorbed slowly enough to be eliminated before it builds up, you won’t feel very high. In other words, the measurement of your BAC depends on many complex factors. Scientists have developed various technologies for measuring the BAC and in this section will discuss these processes and their benefits and limitations.