In healthy people who eat meals at consistent times each day, insulin levels in the blood rise to their highest point around 6:04 PM and reach their lowest point during the night while fasting, suggesting that when food is eaten has a stronger influence on insulin release than the body's internal clock.

44

Pro

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Against

Evidence from Studies

Supporting (1)

44

Community contributions welcome

44

Characterizing 24-Hour Skeletal Muscle Gene Expression Alongside Metabolic and Endocrine Responses Under Diurnal Conditions

Cross-Sectional Study

Human

2025 Mar 17

Scientists made people eat small meals every hour during the day and fast at night, then measured insulin levels. They found insulin peaked in the evening right after eating and dropped at night when fasting—showing it follows when you eat, not just your body’s internal clock.

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Source Study

Characterizing 24-Hour Skeletal Muscle Gene Expression Alongside Metabolic and Endocrine Responses Under Diurnal Conditions

Score: 44

DOI: 10.1210/clinem/dgae350

Similar Assertions

In healthy people with regular feeding schedules during waking hours, the activity of specific genes in muscle tissue that manage glucose and fat metabolism follows a daily rhythm, and the timing of this activity matches changes in insulin levels in the blood.

44

0

74%

Eating dinner later than usual, relative to a person's internal body clock, raises blood glucose but does not significantly change insulin levels after the meal. This suggests that the body's insulin response becomes less tightly linked to glucose changes under circadian misalignment.

54

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71%