Body clock diet: could aligning meals with teen sleep cycles boost weight loss?

This trial tests whether time-restricted feeding—eating all meals within a 16-hour fasting window—helps adolescents with overweight or obesity lose weight, and whether matching meal times to a teen's natural chronotype (early vs. late) makes a difference. About 120 teens aged 12-18 with a late chronotype will be randomly assigned to an early eating schedule, a late eating schedule, or a control group with calorie restriction only. The study tracks changes in weight, body fat, and quality of life over 12 weeks to see if personalized meal timing improves weight loss outcomes.