This study was a randomized, double-blinded and placebo-controlled research. This study was approved by the Institutional Review Board of the Chung Shan Medical University Hospital and all Participants signed the written informed consent to participate in the study.~Participants met the inclusion criteria, ie: age 20~45 yr and a regular menstrual cycle (21~35 days per cycle) were recruited through advertisements posted around the Chun Shan Medical university campus. In screening phase of this study, affective and one somatic symptom in before onset of menstruation in two consecutive cycles and was not affected by depression or anxiety disorder, she is examined by the Attending Physician of the Obstetrics and Gynecology Department to diagnosed a patient with premenstrual syndrome. In the intervention phase of this study, 105 eligible participant were randomly divided into intervention (Grape King Hericium erinaceus Mycelium Capsules and Grape King Probiotic Capsules) and control groups (n=35/group). Both subjects and researchers were blind to the treatment assignment until the statistical analysis was completed. All participants received two oral capsules containing Hericium erinaceus Mycelium, probiotics or placebo every day for the 3 months. The capsules of intervention supplementations and placebo provided by Grape King Biotechnology Inc in identical appearance and package to guarantee the blindness.~Data collection A validated semi-quantitative Food Frequency Questionnaire was used to obtain daily nutritional values of participants. To assess the symptoms of PMS, all subjects need to fill out daily record of severity of problems on a daily basis in the 3 months of intervention period and 6 months after the intervention. In the 0, 1, 3 months of intervention, the anthropometric parameters and body composition were measured by using bioelectrical impedance analysis method ( MC-980 MA PLUS, TANITA BIA Technology). In the 0, 1, 3 months of intervention, venous blood samples were taken from all subjects for measuring the marks of oxidative stress and inflammation.
The purpose of this experiment is to evaluate the efficacy of supplemental health food Grape King Hericium erinaceus Mycelium Capsules and Grape King Probiotic Capsules in improving physical and psychological symptoms, blood oxidative stress and inflammation indicators in women with premenstrual syndrome.