FABP2 and major depressive disorder: Based on the correlation heatmap, the following factors were chosen for regression models: age, weight, diastolic blood pressure (dBP), triglycerides (TG), cholesterol, C-reactive protein (CRP), I-FABP, bSCFAs, depression subscale of Depression, Anxiety, and Stress Scale (D-DASS), fruits, oils, vegetable and seeds, sweets, meat, or cereal intake, and physical activity level.