Yogurt with live cultures can actually reduce your allergy symptoms.
anti-oxidants have also been shown to help reduce the symptoms of seasonal allergies, so load that yogurt up with lots of fruit like strawberries, blueberries, and blackberries.
Enjoy this healthy, yummy, natural allergy relief!
update: here is an article I found that gives some information on yogurts effects of seasonal allergies. As well as other foods that can help treat allergies.