IGHE and Allergy: It was also found that low-molecular-weight lentinan suppressed allergic symptoms, such as seasonal and perennial rhinorrhea, sneezing, nasal obstruction, itching, tearing in humans, and allergen-specific IgE and total IgE levels [52], indicating that the β-1,3-1,6-D-glucan found in mushrooms and yeast has immunomodulatory and allergy-suppressing effects.