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Time restricted feeding (TRF) involves confining the eating window to a specific number of hours, and fasting for the remaining hours of the day.

This study examined if changes in body weight and metabolic risk factors during TRF, differ between premenopausal and postmenopausal women.

This is a secondary analysis of an 8-week TRF study (4–6 h eating window, 18–20 h fasting window daily) conducted in adults with obesity. Male participants were excluded, and female subjects were classified in two groups based on menstrual status: premenopausal (n = 13), or postmenopausal (n = 19). Perimenopausal women were excluded from the original study.

Body weight decreased by week 8 in premenopausal women (−3.3 ± 0.4%) and postmenopausal women (−3.3 ± 0.5%) (main effect of time, P < 0.001), with no difference between groups (no group × time interaction …