GHRL and obesity due to melanocortin 4 receptor deficiency: Future research should pursue four directions: first, validate neural markers across clinical populations (e.g., obesity, anorexia nervosa) to establish transdiagnostic utility; second, employ personalized food stimuli calibrated to individual preferences; third, integrate metabolic biomarkers (e.g., ghrelin) to quantify hunger-state modulation of suppression efficacy; and fourth, use longitudinal designs to track whether memory control deficits predict dietary relapse.