Studies on time-restricted eating outside of Ramadan show mixed results on cortisol levels: some report decreases, some show no change, and others report increases, with no clear relationship to when eating occurs during the day.

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Evidence from Studies

Supporting (1)

26

Community contributions welcome

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The Window Matters: A Systematic Review of Time Restricted Eating Strategies in Relation to Cortisol and Melatonin Secretion

Systematic Review

2021 Jul 23

Some studies found that eating only during certain hours lowered cortisol at certain times of day, while others found no change or even higher cortisol—so scientists still don’t know for sure how this kind of eating affects stress hormones.

Contradicting (0)

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No contradicting evidence found

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Source Study

The Window Matters: A Systematic Review of Time Restricted Eating Strategies in Relation to Cortisol and Melatonin Secretion

Score: 26

DOI: 10.3390/nu13082525

Similar Assertions

During Ramadan fasting, cortisol levels at night tend to be higher than usual, while morning cortisol levels are lower, which may indicate a disruption in the body’s natural daily hormone cycle and could be related to changes in metabolism and sleep patterns.

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80%

During Ramadan fasting, when eating is limited to nighttime hours, levels of the sleep hormone melatonin decrease at night, and the daily pattern of the stress hormone cortisol shifts—rising in the evening and falling in the morning—which may affect sleep and metabolic processes.

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72%