Abbreviations
HEART, THYROID, COLD, BROWN
ATP, Adenosine Triphosphate; β-AR, β-Adrenoreceptor; BAT, Brown Adipose Tissue; BMI, Body Mass Index; CIT, Cold Induced Thermogenesis; DIO 2, Deiodinase 2; FA, Fatty Acids; fT3, Free Trijodothyronine; fT4, Free Thyroxine; HbA1c, Glycated Hemoglobin; HR, Heart rate; PET, Positron Emission Tomography; REE, Resting Energy Expenditure; RQ, Respiratory Quotient; SNS, Sympathetic nervous system; TH, Thyroid Hormone; TSH, Thyroid Stimulating Hormone; UCP1, Uncoupling Protein 1.