A groundbreaking meta-analysis has revealed that the timing of meals may be as important as what or how much we eat. Researchers analysed 41 randomised controlled trials involving around 2,200 participants, finding that finishing dinner before 5pm or 7pm led to significant improvements in body weight, BMI, body fat percentage, waist circumference, blood pressure and metabolic markers.
The study challenges the traditional 'calories in, calories out' model. Even without reducing overall calorie intake, those who ate within an earlier window showed better metabolic health, including lower fasting blood glucose, insulin and triglycerides. This suggests that eating patterns have independent positive effects beyond calorie restriction.
Scientists explain that the body handles sugar more efficiently earlier in the day. Insulin secretion peaks between 12pm and 6pm and is lowest during sleep, meaning the same meal causes a higher blood sugar spike when eaten at night. Thus, eating earlier aligns with the body's natural hormonal rhythms.
While practical challenges remain—such as modern work schedules and social commitments—the findings offer a nuanced approach to diet. For those who struggle with calorie counting or restrictive eating, focusing on meal timing could be a sustainable alternative. As one expert notes, if you're going to indulge in chocolate, it's better to have it before 5pm when your body is primed to process it.
