Many products are sold over the counter to reduce the symptoms of allergies. The main cause is never considered. A foreign substance can cause an increase of the 5-Lox enzyme with an elevated level of leukotrienes. The most effective way to support individuals with allergies is with an age old Chinese formula containing licorice root, Chinese peony, Siler, Sweet wormwood, Summer Cyprus, and Dong Quai. This Chinese formula has been in the Chinese medical text for 5,000 years. Usually 1000 mg twice a day is highly effective. In order to reduce the elevated level of leukotrienes, many alternative physicians prescribe boswellia.