Why eating dinner late might spike your blood sugar
1654-P: Effects of Acute Late Isocaloric Eating on 24-h Blood Glycemia in Adults with Overweight and Obesity
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Even if you eat the same food at the same calories, eating dinner late makes your body less able to handle sugar the next morning.
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Max 58Cross-Sectional Studies
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Participants are randomly assigned to treatment or control groups, minimizing bias. Considered the gold standard for testing whether an intervention causes an effect.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Even if you eat the same food at the same calories, eating dinner late makes your body less able to handle sugar the next morning.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 550 / 90
Evidence Score
Participants are randomly assigned to treatment or control groups, minimizing bias. Considered the gold standard for testing whether an intervention causes an effect.
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Claims (6)
When people eat all their daily calories earlier in the day instead of later, and consume the same total number of calories, their fasting blood sugar and diastolic blood pressure are lower.
In adults with overweight or obesity, eating the same amount of food later in the day raises blood glucose levels by 3% over 24 hours compared to eating the same food earlier, with an additional 9% higher rise during sleep, showing that the timing of meals affects blood glucose independently of total calories or nutrients.
In adults with overweight or obesity, eating the first meal of the day after a 20-hour fast causes a 42% reduction in the initial insulin spike after eating, while total insulin released over three hours remains unchanged, showing a temporary decrease in how strongly pancreatic beta cells respond to glucose.
In adults with overweight or obesity, fasting for 20 hours before the first meal leads to an 87% larger spike in blood glucose after eating compared to fasting for 16 hours.
In adults with overweight or obesity, eating later in the day does not change total insulin exposure over 24 hours but lowers insulin levels during daytime hours by 5%, showing that glucose and insulin patterns change independently, which is linked to differences in how insulin is released or how tissues respond to it.