Cinnamon with exercise training and chest circumference in overweight women

However, direct comparisons between groups revealed a meaningful difference only for chest circumference reduction (p = 0.003); abdominal circumference and all reproductive hormone concentrations showed no statistically significant advantage from adding cinnamon (p > 0.05). The trial was small (13 per arm) and lasted only 4 weeks, limiting confidence that cinnamon provides a benefit beyond exercise alone. The findings suggest exercise itself drives the favorable changes in body shape and hormone balance in this population, but do not establish a role for cinnamon supplementation.

The study was underpowered to detect small additive effects of cinnamon—each group had only 13 women and the intervention was brief. Estradiol and progesterone rose in both groups, while LH fell; these hormonal shifts favor ovulatory function and may contribute to fertility improvement, though the trial did not measure fertility outcomes directly. Chest circumference showed a statistically significant between-group difference, but the clinical magnitude was modest and the authors note this finding may not reflect a true cinnamon effect. Notably, the exercise protocol itself (moderate activity 3 times per week for 4 weeks) was sufficient to produce measurable changes, suggesting the dose of activity, not supplementation, was the active ingredient. Larger trials with longer follow-up and adequate statistical power would be needed to rule out a modest benefit of cinnamon.