Purpose: The present study investigates the effect of fennel on reducing menopausal symptoms compared to placebo in Iran Methods: This study was a randomized clinical trial with a control group. In this regard, 101 people were selected by convenience sampling from the Rahe Sabze Salamat Clinic and were randomly allocated to two groups of fennel (n= 49) and placebo (n= 52). Data were collected through the menopause rating scale (MRS). The collected data were statistically analyzed using SPSS-27 software. Results: The results revealed that the studied groups did not differ significantly from each other regarding age, height, weight, BMI, education level, marital status, and employment status (P> 0.05). Also, the results revealed that fennel significantly reduced menopausal symptoms compared to placebo in the post-test and follow-up stages (P< 0.05) Conclusion: Based on the results of this study, fennel has ....