IL33 and metabolic syndrome: The results showed higher levels of serum IL–33 and IL–37 in participants with MetS than those without (IL-33, 3.34 3.42 (2.3–3.9) vs. (1–3.9), p = 0.057; IL-37, 5.1 (2.2–8.3) vs. 2.9 (2.1–6.1), p = 0.01).