RCTHumann = 30 participants2025

The effect of early time-restricted eating on muscle damage-related biomarkers and anxiety in older men.

Journal: Experimental gerontologyPublished: 2025DOI: 10.1016/j.exger.2025.112896

Plain-language summary

This study asked whether eating all meals inside an eight-hour window early in the day changes body composition, muscle damage markers and anxiety in older men. Thirty healthy elderly men were assigned either to eat only between 7 AM and 3 PM for two months or to keep their usual habits. Within the eating-window group, weight, BMI, body fat and fat-free mass all improved, and CPK, AST, CRP and bilirubin all fell, which the authors read as less physiological stress. Comparing the two groups against each other, the differences that held were in BMI, body fat, fat-free mass, uric acid, CRP, AST and the anxiety scales. Other time-restricted eating studies in this library used different windows, different ages and different measurements, so they are not tests of the same routine.

Key findings

Within the eating-window group, weight, BMI, body fat and fat-free mass all improved over two months.
Within that group, CPK, AST, CRP and bilirubin all fell.
Comparing the two groups, the differences that held were in BMI, body fat, fat-free mass, uric acid, CRP, AST and anxiety.
The abstract does not say which way fat-free mass moved, only that it improved.

How to analyze the study yourself

Study type: Randomized trials assign people to groups by chance, so differences between groups are unlikely to come from who chose what, but small sample sizes can limit how broadly the findings apply.
Population: Healthy elderly men (specific age range not reported).
Funding: Not reported
Takeaway: This study found that older men who ate only between 7 AM and 3 PM for two months came out better than men eating as usual on body fat, fat-free mass, inflammation and anxiety. It was thirty men over two months, so it is a start rather than a settled answer. If you are older and an early eating window suits your day, it may be worth trying for a couple of months and judging it on how you feel and what the scale says.