I feel like going on IF without some kind of carbohydrate restriction (ideally, ketogenic diet) is a bit like alternating between stepping on the brakes and on the accelerator, i.e. not as healthy or effective.

Beer can be high in sugar, especially Belgian/Abbey beers that often include glucose syrup in their ingredients. Something I discovered with horror as they are some of my favorites :/

EDIT: clarification, don't want to imply that IF without carb restriction is bad, just probably not as effective.