Why the timing of meals matters
Research shows that the time you choose to eat can change how your body handles food. In one study, people who ate a large share of their daily calories after 5pm had worse glucose tolerance than those who ate earlier in the day.
Why the timing of meals matters
Research shows that the time you choose to eat can change how your body handles food. In one study, people who ate a large share of their daily calories after 5pm had worse glucose tolerance than those who ate earlier in the day.
Their total calories and overall diet were similar, which suggests that timing itself affects how the body manages sugar.
A scientific review on chrononutrition explains that our internal body clock works together with our eating schedule. When eating patterns fall out of sync with this clock, metabolism, weight regulation and blood sugar control can be affected.
How your body clock influences metabolism
The body runs on a daily rhythm. The brain has a master clock, while organs like the liver and pancreas have their own clocks. These systems work best when food is eaten during the hours the body expects to be active. During daytime, insulin sensitivity and energy use are stronger. At night, when the body expects rest, these processes slow down. Eating during this slower phase makes it harder for the body to handle glucose and fats efficiently.
What the studies show
In the human trial, late eaters showed higher glucose levels during a glucose tolerance test. This effect remained even after accounting for weight, fat mass and total calorie intake. The chrononutrition review shows that late eating, especially during biological night when melatonin rises and insulin sensitivity drops, can support fat storage and worsen glucose and lipid control.
Times to avoid eating
The evidence points to avoiding large meals late in the day, especially in the evening. Eating when the body has shifted toward its night phase can disrupt metabolic rhythms. Although the exact clock differs between individuals, the general pattern is clear. Eating earlier supports better glucose control, while night eating can work against the body’s natural timing.
What this means for everyday habits
If you want to support healthier metabolism, try to place your main meals earlier rather than later. Aim to finish eating well before your usual bedtime. Keeping meals aligned with your active hours helps the body maintain steady metabolic rhythms.
Sources:
Find out what Dr. Kristie Leong has to say about meal timing:
https://x.com/DrKristieLeong/status/1992928702959591838
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