I think that they did calculate in the emissions from the enzyme production. However, the brewery, Harboe, is known to make the cheapest swill, only most of their beers taste ugly, not just bland. I once bought their pale ale just to discover that it was brewed with a lager yeast.
I will sacrifice myself and see if I can get hold of a Clim8 tonight, and I'll let you know how it tastes.