Atopy is a term used clinically to apply to a group of diseases of an allergic nature. IgE is an antibody the body produces as a response to an allergen. Research appearing in the November 4, 2000 issue of The Lancet shows that vitamin E consumption lowers atopy in adults. The researchers measured IgE in 2633 adults and correlated it with dietary vitamin E consumption. Higher vitamin E consumption was correlated with lower IgE levels and lower sensitivity to allergens. The researchers found that every additional milligram of vitamin E per day lowered IgE levels by 5%, with this effect leveling off at seven milligrams of vitamin E.