If its type 1 diabetes it is manageable with proper monitoring but it is with you till you die(unless medicine advances significantly), type 2 can be completely cured with proper diet and exercise. I see no reason that you couldn't keep brewing if you stuck to a healthy diet otherwise. check out the paleo methodology and even the raw food methodology. Both of these expound eating no processed foods(no sugars, no potato chips) and eating food as close to its natural form as possible or completely raw. Lots of greens, healthy meats, and veggies. Both, if adhered to, will regulate the bodies systems and will eliminate the need for insulin control.
most importantly: lose any excess weight you have and spend as little time sitting on your butt as is possible.
I am not a medical professional, nor have I had diabetes. This information is from a lot of reading and research on different dietary paths as well as attempts to help family and friends with this imbalance.
People have been drinking fermented beverages for thousands of years, only recently has our diet gone to crap - so up pops diabetes.