Just a bit of clarification...the added sugar doesn't directly boost alcohol content...it increases the fermentable sugars.joeymac wrote:Sugar head...uses grains for flavor, body and nutrients but then sugar is added directly to the wash to boost the alcohol content...A sugar head can use the "spent" grains from a previous all grain wash to flavor the next wash and then sugar is thrown in to allow the yeast to continue making alcohol.
For example, if you add sugar enough to raise the OG to 1.100, then it likely won't all ferment out/dry, leaving residual sugars in the ferment. But, adding sugar to a sugarhead will add fermentable material for the yeast to consume to the extent that they can (within their metabolism and the environmental conditions would allow, i.e. - alcohol tolerance, temperature, pH, and nutrients available).