I have tried many things, serrapeptase works best for me. It's not 100%, but my diet isn't the greatest either. Plus, it's fairly cheap and easily available. I use Doctor's Best brand. Give it a try.
I also consume a variety of herbs, I am sure that is helpful as well. I really like stinging nettle. A good strong infusion of it is quite nourishing in addition whatever other benefits it may provide.
RE: discussion and suggestions on battling allergy, please?