IL5 and obesity due to melanocortin 4 receptor deficiency: Perhaps complicating this result with respect to obesity, another study of 131 subjects with severe asthma found that while BMI positively associated with sputum IL-5 (eosinophil growth factor) and bronchial submucosal eosinophil counts, it did not correlate with sputum or blood eosinophil counts [48].