... inhibits the “4-series leukotrienes” (LTB4, LTC4, LTD4, and LTE4) that are activated, in part, by 5- LOX, making it helpful for asthma, allergies, sinusitis, and emphysema.9-12 In a six-week, double-blind, placebo-controlled clinical study, Boswellia was tested in 40 individuals with asthma, a ...