If you have PCOS, you’ve probably heard all sorts of advice, from “just lose weight” to “try this new diet,” but what’s being researched more and more and might be of particular interest to you is your gut and the bacteria that live in it . Yes, your gut and your ovaries are more connected than you think.
Scientists compared the guts of women with PCOS and those without it and discovered several clear differences:
Less diversity – means that the intestines of women with PCOS have a “poorer” selection of bacteria, so the system functions less well.
Lack of “good” bacteria – such as Akkermansia and Bifidobacterium , which protect the intestinal mucosa and reduce inflammation.
An excess of “problematic” bacteria like Desulfovibrio , which produce substances that can promote inflammation and bloating.
Lower levels of short-chain fatty acids (SCFAs) – especially butyrate, which nourishes gut cells, boosts resistance to inflammation and even helps balance hormones.
More branched-chain amino acids (BCAAs) – which have been linked to insulin resistance and harder blood sugar regulation.
In other words: the intestines in PCOS are often inflamed, more permeable, and less resistant , which then affects hormones, metabolism, and mood.
Think of the gut microbiome as an orchestra. When all the instruments are playing in harmony, everything runs smoothly, but when some players are out of tune, chaos ensues.
This is exactly what happens with PCOS :
Sugar and energy metabolism
A lack of good bacteria means fewer SCFAs, which are substances that normally improve insulin sensitivity. Instead, more toxins like LPS promote inflammation and make it harder for cells to “listen” to insulin. The result? More blood sugar, more fat, and even more hormonal imbalances.
Fat metabolism
Normally, SCFAs help fat cells burn energy and store less fat. Without them, fat is more likely to accumulate – especially in the abdominal area.
Bile acids as hormonal messages
Bile acids are not only for digesting fat – they also send signals to hormones. In PCOS, the microbiome produces more secondary bile acids, which alter the work of hormones such as GLP-1 (important for appetite and blood sugar).
Intestinal permeability and inflammation
When the intestines become “leaky”, small inflammatory molecules pass through them into the blood. This can worsen insulin resistance, as well as hormonal disorders.
Here’s where research shows the greatest potential:
Food rich in fiber – vegetables, fruits, legumes, oats, quinoa. Fiber feeds good bacteria and increases SCFA production.
Probiotics and prebiotics – certain strains of Bifidobacterium and Lactobacillus can help with hormones and insulin, and prebiotics feed these strains.
More plant-based protein – research shows that a diet with more plant-based protein and less animal protein can increase good bacteria and reduce BCAA levels.
Physical activity – regular exercise increases the diversity of gut bacteria and improves insulin sensitivity.
Vagus nerve stimulation – although still in the research phase, shows potential in reducing inflammation, improving insulin sensitivity and regulating hormones through the gut-brain-ovary axis.
If you have PCOS, it’s important to know that your condition isn’t “just hormonal.” It involves the entire body, and the gut plays a much bigger role than previously thought.
By nurturing your gut microbiome – through diet, probiotics, prebiotics, and exercise – you can influence inflammation, insulin, and even hormones.
It’s not a magic wand, but it’s a powerful tool that can help you feel better and have more control over PCOS.
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