There is a strong positive association between asthma incidence and lectin levels in prepubescent males and postmenopausal women. Obesity reduces progesterone levels in women, which lowers the levels of β2 adrenergic receptors, decreasing the relaxation of muscle in the respiratory tract . The concentrations of both total and specific IgE in children and adolescents with allergic symptoms are higher among those who are overweight or obese .