Early-onset time-restricted feeding improved healthspan markers in both male and female mice on standard diet, though lifespan extension occurred only in males. This sex-differentiated response suggests that feeding timing influences aging trajectories through mechanisms that operate independently in males and females.
Key Points
- Time-restricted feeding improved healthspan in both sexes
- Lifespan extension occurred only in male mice
- Effects emerged from standard diet, not caloric restriction
Longevity Analysis
The divergence between healthspan and lifespan outcomes across sexes complicates the assumption that feeding timing acts uniformly on aging. Both males and females showed improved functional capacity and disease resistance markers, indicating that eating windows influence how tissues repair and defend themselves against age-related decline. The male-specific lifespan extension suggests that downstream hormonal and metabolic cascades—particularly those shaped by reproductive endocrinology—determine whether improved tissue health translates to extended survival. For practitioners, this indicates that time-restricted feeding may benefit both men and women's disease prevention and functional preservation, but longevity outcomes may require additional or complementary interventions in women.
Original published by Nature Aging, by Samantha E. Iiams.