According to Sapporo Breweries, a substance in hops, flavonol glycoside, is effective in reducing hay fever responses by blocking the production of histamine.

Sapporo Group conducted a clinical trial of 20 patients with hay fever symptoms and found that 60% them noted less sneezing and 55% noted less runny nose with significant improvements on their symptom-medication scores.

The Japanese brewing giant is planning to release a new beer with the hop flavonol isolated and market it to hay fever sufferers.

(via Brookston Beer Bulletin)