I did a 3-day water fast and then started a low-histamine diet, and got immediate improvement in sinus & throat symptoms. I lucked into an amazing alternative doctor who looked at my notes and agreed that I've got this intolerance. I've just added Daosin this morning, and got more improvement in all the phlegm-related issues. My doctor is talking about adding quercetin to my experiments. I can't take any antihistamines, but Zand allergy formula works well for pollen. [But I haven't been taking it, as I experiment with Daosin and diet.] I'm looking for everybody's ideas about what to layer in, and how to best do it so I can tell what's helping. What brands do you use, what strength and dosing schedule? What in the histamine releasing-mopping up cycle do your interventions target? Could you help me create a structure for experiments? You might have ideas my doctor hasn't thought of, including reactions he wouldn't expect. I'm very sensitive to non-herbals.