Meal timing and circadian rhythms impact metabolism and heart health

Research into circadian biology suggests that the timing of food consumption significantly impacts metabolic processes. Studies indicate that eating earlier in the day may enhance thermogenesis, improve insulin sensitivity, and assist in appetite regulation compared to consuming the same meals late in the evening.

Human metabolism is closely tied to the circadian rhythm, the body’s internal biological clock. Because insulin sensitivity and digestive activity are generally higher during daylight hours, the body processes glucose more efficiently in the morning. As the body prepares for sleep at night, these metabolic processes shift.

A large French study involving over 100,000 adults from the NutriNet-Santé cohort has explored the concept of ‘eating jetlag’—the discrepancy between weekday and weekend meal schedules. This research suggests that inconsistent eating patterns, such as significantly delaying meals on weekends, may be linked to an increased risk of cardiovascular disease in men.