Eating earlier in the day for 4 days lowered cortisol levels in the evening for overweight people compared to eating throughout the day.
Scientific Claim
Early time-restricted feeding decreased evening cortisol levels by 1.4 μg/dl in overweight adults after 4 days of intervention compared to a control schedule.
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
definitive
Can make definitive causal claims
Assessment Explanation
This is a randomized controlled trial with direct measurements of cortisol levels. The verb 'decreased' is appropriate for this specific short-term effect.
Source Excerpt
“In the evening, eTRF reduced cortisol levels by 1.4 ± 0.6 μg/dl (p = 0.03) and tended to increase BDNF levels by 2.46 ± 1.34 ng/ml (p = 0.09).”
Evidence from Studies
Supporting Evidence (1)
The study measured cortisol levels in the evening and found a statistically significant decrease with eTRF. Cortisol is a stress hormone that follows a circadian rhythm.
Early Time-Restricted Feeding Improves 24-Hour Glucose Levels and Affects Markers of the Circadian Clock, Aging, and Autophagy in Humans