IL6 and asthma: This systematic review (24) including 40 studies showed that the proportion of neutrophils in adult asthma patients in the obese group was 5% higher than that in the non-obese group (MD = 5.0%, 95% CI: 1.2–8.9, p = 0.01), and the levels of serum inflammatory markers such as C-reactive protein (CRP) and interleukin-6 (IL-6) were significantly elevated.