This comes up all the time. Do you lose alcohol in your brew by pasteurizing? I've heard it all, and used to think the same way! 160F is where ethanol boils, right? So it's fine at 140. What about water? Water boils at 212F, but it will evaporate under 100F.... So, what's the story on alcohol loss from pasteurization? Let's test. The results might surprise you!