Ask Mr. Wizard

Terminal Gravity Woes

TroubleShooting

Paul Epp — Via email asks,
Q

Can I add alpha amylase enzymes to my fermenter to help my beer attenuate? My original gravity (OG) was 1.079 and it has been two weeks. Now my beer is at 1.040 and is not showing any fermentation activity.

A
Alpha amylase can be added to the fermenter to aid in attenuation, but it has limited efficacy in converting dextrins and starch into fermentables. The primary role of the endoenzyme alpha amylase
Response by Ashton Lewis.