“…Several inflammatory cytokines, such as IL1b, IL6, and TNF-a, can suppress, via direct or indirect pathways, the thyroid function at different levels (41, 42). In sepsis, the increase in the production of pro-inflammatory cytokines is more pronounced than that in other types of critical illness (43,44). In this respect, baseline levels of thyroid hormones, including T 4 , T 3 , and TSH, can be substantially lower in septic patients than in non-septic patients with critical illness of similar severity (45).…”