I have problems digesting fructose and I've yet to see a digestive enzyme that has the ability to break this down (no fructase). Any ideas?

What's strange is that most sugars maldigest. Fructose being one (I can eat in small quantities at a time) and the obvious lactose (which I don't really care about since I don't do dairy). Some other sugars seem to bug me in large quantities as well.