LEP and COVID-19: The median levels of leptin in COVID-19 patients were 7476.3 pg/mL (Q1–Q3: 2471.6–21,695.15 pg/mL) for leptin 1 and 6543.75 pg/mL (Q1–Q3: 94,302.5–12,064 pg/mL) for leptin 2, while the control group had levels of 12,586.75 pg/mL (Q1–Q3: 4786.33–22,446.51 pg/mL) for leptin 1 and no recorded levels for leptin 2.