Last year a few people suffered from hayfever and were talking about using honey to help so here's a reminder!
(Details from my father-in-law who's a beekeeper.)
You should start taking the honey about 3 months before your hayfever season starts. Take a teaspoonful every day and chew it.
The honey should be local, from within a 10 mile radius of where you run. The best is comb honey or if you go direct to the beekeeper you may be able to get "cappings" which are the bits taken off the comb to extract the honey.