Reduction of Menopausal Symptoms Through Plant-Based Diet

Prevalence of Menopausal Symptoms

In Western nations, approximately 80% of postmenopausal women experience vasomotor symptoms, commonly known as hot flashes. These symptoms involve peripheral vasodilation, leading to sensations of warmth in areas such as the face, neck, and chest, accompanied by sweating and flushing. Additional menopausal symptoms can include night sweats, mood changes, sleep disturbances, and cognitive issues.

Impact of Soy Products

Research indicates that soy products may reduce the frequency of hot flashes. This effect is likely attributed to isoflavones found in soy, which gut bacteria can convert into equol, a nonsteroidal compound that some studies suggest alleviates hot flashes. Variations in diet influence gut bacterial populations; for example, vegetarian and vegan diets tend to produce higher equol levels. Moreover, plant-based diets can swiftly modify gut microbiota.

Benefits of a Plant-Based Diet Rich in Soy

WAVS Study Overview

A study conducted by the North American Menopause Society examined the effects of a low-fat plant-based diet combined with soybeans on menopausal hot flashes. This research, known as the Women’s Study for the Alleviation of Vasomotor Symptoms (WAVS), was inspired by Dr. Neal Barnard’s book “Your Body in Balance.” Co-author Dr. Hana Kahleova remarked, “Previous studies have shown that soy could be beneficial, so we decided to put a diet change to the test. We believe that the combination is what is important.”

Study Design and Participants

Postmenopausal women aged 45 to 65 who experienced moderate to severe hot flashes at least twice daily were enrolled in the study. Participants were randomly assigned to either a low-fat, vegan diet that included 86 grams of soybeans daily or to a control group with no dietary changes for 12 weeks. The intervention group’s diet focused on fruits, vegetables, whole grains, and legumes, avoiding oils and fatty foods. The half cup of soybeans provided an estimated 55-60 grams of isoflavones each day.

Findings on Menopausal Symptoms

The study revealed significant reductions in menopausal symptoms without pharmacological intervention. The intervention group experienced a 79% reduction in overall hot flashes, while the control group saw a 49% decrease. Moderate to severe hot flashes dropped by 84%, with participants on the plant-based diet reporting fewer than one hot flash per day. By the study’s conclusion, 59% of those in the intervention group were free from moderate to severe hot flashes, while no significant changes were observed in the control group.

Additional Health Benefits

Participants following the plant-based diet plus soy also reported improvements in energy levels, mood, and sexual symptoms. Moreover, the intervention group experienced an average weight loss of 3.5 kilograms.

Participant Feedback

Dr. Kahleova noted, “By the end of the study, the majority of women on a plant-based diet rich in soy reported that they no longer experienced moderate-to-extreme hot flashes at all and that they experienced significant improvements in their quality of life.” Feedback from participants was overwhelmingly positive, with some stating, “Before you jump to any kind of medication, I would try this route because it’s easy. Anybody can do it.” Another participant remarked, “This was basically a lifesaver for me. I’ve got my quality of life back,” while another shared, “I am sleeping better, and my hot flashes diminished tremendously.”

Conclusion

This study adds to the growing body of evidence supporting the effectiveness of a plant-based diet and regular soybean consumption in reducing hot flashes. Dr. Barnard emphasized, “This is a game-changer for women aged 45 and over, most of whom we now know can get prompt relief from the most severe and troubling menopause symptoms without drugs.”

References

1. Franco O, et al. (2016). Use of plant-based therapies and menopausal symptoms: a systematic review and meta-analysis. JAMA, 315(23), 2554-2563. Retrieved from: https://pubmed.ncbi.nlm.nih.gov/27327802/
2. Daily J, et al. (2019). Equol decreases hot flashes in postmenopausal women: a systematic review and meta-analysis of randomized clinical trials. Journal of Medicinal Food, 22(2), 127-139. Retrieved from: https://pubmed.ncbi.nlm.nih.gov/30592686/
3. Barnard N, et al. (2021). The Women’s Study for the Alleviation of Vasomotor Symptoms (WAVS): a randomized, controlled trial of a plant-based diet and whole soybeans for postmenopausal women. Menopause, 373(262). Retrieved from: https://journals.lww.com/menopausejournal/Abstract/9000/The_Women_s_Study_for_the_Alleviation_of_Vasomotor.96938.aspx
4. Study shows diet causes 84% drop in troublesome menopausal symptoms – without drugs (2021). EurekAlert! Retrieved from: https://www.eurekalert.org/pub_releases/2021-07/pcfr-ssd071421.php