Could A Plant-Based Diet Make Menopause Easier?

Menopause is treated as something women are simply expected to endure.

Hot flushes. Weight gain. Rising blood pressure. Increasing cardiovascular risk. A collection of symptoms and health problems presented as an unavoidable consequence of ageing. But growing evidence suggests diet may have a surprisingly large influence on several of these problems at once.

One long-term study has found that postmenopausal women whose diets most closely resembled a plant-forward Planetary Health Diet had around a 28% lower risk of cardiovascular disease than women whose diets were furthest from it. Another clinical trial found that a low-fat plant-based diet containing soy reduced moderate-to-severe hot flushes by 88%, while women also lost weight. And a major analysis involving more than 309,000 people has linked eating more legumes and soy with substantially lower rates of high blood pressure. These are different studies examining different outcomes. But they keep pointing in the same direction.

More beans. More lentils. More soy. More whole plant foods. Fewer animal products.

Heart Disease Risk Falls After Menopause

Cardiovascular disease becomes increasingly important as women age, with risk tending to rise after menopause. Researchers examining data from the Women’s Health Initiative followed 66,892 women for around 20 years. The women were approximately 63 years old when they entered the study and none had cardiovascular disease at the beginning. Researchers compared their diets using the Planetary Health Diet Index. The dietary pattern emphasises fruits, vegetables, whole grains, legumes, nuts and unsaturated fats while limiting animal products, refined grains, added sugars and saturated fats. Women with the highest adherence had approximately 28% less cardiovascular disease than those with the lowest adherence. They also had lower rates of coronary heart disease, stroke and heart failure. Importantly, this was not an all-or-nothing effect. Each 10-point improvement in the diet score was associated with further reductions in risk. Dietary discussions are frequently sabotaged by the idea that unless somebody completely transforms everything they eat overnight, there is little point changing anything. The evidence suggests otherwise. Eating more plants appears beneficial even before somebody reaches the most plant-rich end of the spectrum.

This study was observational, so it cannot prove that diet directly caused the difference. Researchers did, however, adjust their analysis for factors including age, smoking, alcohol intake, physical activity, body mass index, income and calorie intake. And this is far from the only research pointing towards cardiovascular benefits from plant-based eating.

Protein Is Not Just Protein

Another study looked specifically at postmenopausal women and challenged another remarkably persistent nutrition myth: that protein is basically interchangeable regardless of where it comes from. Researchers followed 84 postmenopausal women over 12 weeks. One group ate a low-fat plant-based diet supplemented with soybeans while the control group continued eating an omnivorous diet. Among women eating plant-based, animal protein intake fell by 23.3 grams per day while plant protein increased by 22.1 grams.

Total protein barely changed.

Their body weight did.

The shift from animal to plant protein was associated with significant weight loss, independent of calorie intake. Researchers calculated that replacing roughly 16 grams of animal protein with around 13 grams of plant protein corresponded with approximately one kilogram of weight loss. One possible explanation involves methionine, an amino acid found at higher concentrations in many animal products. Lower methionine intake was significantly associated with reductions in BMI, although researchers stress that the mechanisms involved still require investigation. The more immediate point is much simpler. Women did not need more protein. Changing where their protein came from was associated with a measurable difference.

Soy And Hot Flushes

In the wider clinical trial, moderate-to-severe hot flushes fell by an extraordinary 88% among women eating the low-fat plant-based diet with daily soybeans. Women also lost an average of eight pounds over 12 weeks. Soy isoflavones are thought to play a role because they have previously been shown to reduce vasomotor symptoms.

Public understanding remains poor.

A poll by the Physicians Committee for Responsible Medicine found that only 43% of women knew diet could influence the number and intensity of hot flushes. This is despite around three-quarters of women experiencing hot flushes during menopause. Some respondents even believed women going through menopause should avoid soy. The evidence presented here suggests almost the opposite. Soy may be one of the foods women should be hearing considerably more about. And no, the benefits apparently disappear the moment somebody drinks soya milk or eats a plant-based burger.

Further analysis of the clinical trial found benefits even when diets included plant-based foods classified as ultra-processed. Nutrition is considerably more complicated than the increasingly fashionable claim that everything labelled “ultra-processed” belongs in one giant nutritional dustbin.

Beans Could Protect Blood Pressure Too

Legumes may also help tackle another major cardiovascular risk factor. A meta-analysis of 12 prospective studies involving more than 309,000 participants found that people eating larger quantities of legumes had a 16% lower risk of developing hypertension.

For soy, the reduction was 19%.

The relationship became even more striking when researchers examined quantities. Eating around 170 grams of legumes per day was associated with a 30% reduction in hypertension risk. For soy foods such as tofu, tempeh, edamame and miso, benefits appeared to peak at around 60 to 80 grams per day, corresponding with roughly a 28 to 29% reduction. Researchers rated a causal relationship between both food groups and hypertension as “probable”.

But average legume consumption across Europe and the UK sits at only around 8 to 15 grams per day. We have managed to construct a food culture in which some of the cheapest, most nutritious foods available barely appear on many plates.

Plants Are Not A Miracle Cure

None of this means eating plants makes ageing disappear. Menopause is not a disease. Plant-based eating is not a magical cure for every symptom or health condition. Observational research must not be presented as proof of causation, and individual medical circumstances differ. But neither should we shrug at evidence simply because nutrition cannot promise miracles.

Postmenopausal women face increasing cardiovascular risk. Most experience hot flushes. Weight changes are common. High blood pressure remains a major health problem. And across multiple lines of research, foods such as beans, lentils, chickpeas, peas, tofu, tempeh and other soy foods are associated with better outcomes. Meanwhile, animal products remain so deeply embedded in our idea of a “normal” diet that reducing them is still treated as the unusual option. We have that backwards.

You do not need animals to get protein.

You do not need cows for calcium or chickens for breakfast.

Women should not have to reach menopause before discovering that some of the foods society taught them were essential may be the very foods worth replacing.