Study protocol
This trial included a screening phase (one menstrual cycle) and two intervention periods (one menstrual cycle each). Participants visited the clinic once during the follicular and luteal phases to screen for eligibility. On the day of the visit, the participants underwent physical measurements and completed questionnaires regarding their physical and menstrual symptoms. Eligible participants were randomly assigned to receive γ-Toc followed by a placebo (group A) or the same supplementation in reverse order (group B) for 7 days in the luteal phase. The washout period was approximately 3 weeks from the completion of the first cycle of luteal phase test supplement intake to the start of the second cycle of luteal phase test supplement intake. Figure Test schedule