Got Trub?
Well-Known Member
I think they care. If they don't have to produce/secrete an enzyme to metabolize their food, then that's all the less energy they have to expend.
The other thing I'm curious about is if yeast produce different fermentation biproducts (esters, etc.) or in different quantities when fermenting different sugars. If so, this could result in a flavor difference.
Maybe if you are brewing at extremes of alcohol or percentage of sugar as a proportion of your recipe but otherwise I don't think they would care or we would notice any difference. I have not seen any information that would suggest that invert is better, only suggestions that "theoretically" it is easier on the yeast. According to Brew Like a Monk many Belgian breweries are using sucrose as their sugar adjunct.
GT