The search strategy for our research question on PubMed, using Medical Subject Heading (MeSH) terms and keywords, was as follows: (“Non-alcoholic fatty liver disease” OR “NAFLD” OR “NASH” OR “Non-alcoholic steatohepatitis” OR “Non-alcoholic Fatty Liver Disease” [Mesh]) AND (“hypothyroidism” OR “thyroid” OR “thyroid hormone” OR “thyromimetics” OR “thyroid dysfunction” OR “thyroid-stimulating hormone” OR “thyroxine” OR “triiodothyronine” OR “Thyroid Hormones” [Mesh] OR “Hypothyroidism” [Mesh]). The gene discussed is TG; the disease is thyroid gland disorder.