--- title: Does evening primrose oil reduce PMS symptoms? | Niyora description: Yes. Women taking 1500 mg of evening primrose oil daily for 3 months had significant reduction in PMS symptom severity, while women taking placebo did not imp url: https://niyora.com/research/papers/the-effect-of-primrose-oil-on-the-premenstrual-syndrome-among-the-female-2015/ --- - [Niyora](https://niyora.com/) - [Research](https://niyora.com/research/) - [Library](https://niyora.com/research/library/) - Does evening primrose oil reduce PMS symptoms? Study, 2015 # Does evening primrose oil reduce PMS symptoms? Yes. Women taking 1500 mg of evening primrose oil daily for 3 months had significant reduction in PMS symptom severity, while women taking placebo did not improve. Moderate study design 80 female university students (40 in each group) living in hostels at Lorestan University of Medical Sciences ## What they did Randomly assigned 80 female university students to take either 1500 mg of evening primrose oil daily or placebo for 3 months. They measured symptom severity at the beginning and after 1, 2, and 3 months. ## What they found The group taking evening primrose oil had symptom severity scores drop from 53.20 at the start to 33.62 after 3 months. The placebo group's scores went from 53.38 to 50.27 over the same period. Only the evening primrose oil group showed clear improvement. ## What it means for you Evening primrose oil may help reduce PMS symptoms. The study involved only female university students living in student hostels, so findings may not apply to all women. The study lasted 3 months, which is relatively short to determine long-term benefit. 80 female university students 1500 mg evening primrose oil daily 3 months of treatment ## About the study Original title The effect of primrose oil on the premenstrual syndrome among the female students in Lorestan University of Medical Sciences: A triple blind study Authors Mandana Saki, Mandana Saki, Soheila Akbari et al. Journal Journal of Nursing and Midwifery Sciences Year 2015 Study design Study Participants 80 What was tested Evening primrose oil 1500 mg daily or placebo Read the paper [doi.org/10.4103/2345-5756.231415](https://doi.org/10.4103/2345-5756.231415) ## Topics [Premenstrual syndrome (PMS)](https://niyora.com/research/topics/condition-pms/)[Students and academic performance](https://niyora.com/research/topics/life-area-education/)[Other herbal medicine](https://niyora.com/research/topics/treatment-herbal-other/) Research tells you what helps on average. Niyora helps on the day it hits. Calm down, see it another way, and decide what to say, with a PMS and PMDD app built by a doctor. ## Related studies Randomised trial, 2025 Which is more effective for PMS - Vitagnus, soy, or both together? Randomised trial, 2026 Can propolis and fennelin reduce PMS symptoms? Survey study, 2026 How common is PMDD among female medical students and what triggers it? Randomised trial, 2024 Does a herbal soft gel capsule with three oils reduce PMS symptoms? Randomised trial, 2021 Does nigella sativa oil reduce PMS symptoms? Randomised trial, 2020 Does anise reduce PMS symptoms? Ask AI about this page Copy prompt ChatGPT ↗ Claude ↗ Perplexity ↗ Google AI Mode ↗ Grok ↗