My friend is a rather experienced beer drinker and he says that when he drinks my homebrew he claims that he has more hangovers than when he drinks the same amount of non-homebrewed beer. I control my fermentation temperatures and to this point have only brewed ales. I tend to ferment at 62 - 68 degrees. Any ideas what is going on with my beers. I have seen other posts about green beer causing headaches, but I let them ferment out, sit, and then force carb for two weeks. I am pretty sure it is not fusal alcohols because of the fermentation control. What can it be?!?!