My husband has had bad allergies all of his life and has been on prescription anti-histimines since he was about 17 (he's 64 now). The homeopathic person that's helping him out put him on Quercitin. He is absolutely astonished that he has no trouble with allergies now. She recommended a particular brand which I guess I can't mention but it has 500mg of Vit C, 1000 mg of Quercetin, 140 mg Bromelain, 100mg Citrus Bioflavonoids, 25 mg Acerola, 25mg Rose hips and 20 mg Rutin. She recommended he take 2 a day. It seems it only took a month or so and he was allergy free. Now he only takes them once in awhile when he feels he needs them. He also takes MSM for his knees but it isn't helping much.