I just got off the phone with one of our suppliers, and they say that the reason for the "increased hop utilization" disclaimer from the manufacturer is mainly for commercial breweries that have ultra-violent fermentations, where the krausen is blowing off via the blow off tube and being lost onto the floor. The krausen has a lot of alpha acid in it, and by using FermCapS (Foam Control) you can retain that krausen, and thereby retaining those bittering units.
Short story - it won;t affect your AAU% unless you normally get a lot of blow off. It adds nothing to your beer, it just prevents AA loss.
Short story - it won;t affect your AAU% unless you normally get a lot of blow off. It adds nothing to your beer, it just prevents AA loss.