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Women's Health  ·  June 2026

The Hidden Connection Between Oestrogen and Your Gut

If you're experiencing hormonal symptoms — irregular cycles, PMS, perimenopause, unexplained weight changes — your gut may be more involved than you think.

There is a specialised community of gut bacteria known as the oestrobolome. Its job is to metabolise and regulate oestrogen — deciding how much gets reactivated and recirculated in the body versus how much gets eliminated.

When the oestrobolome is disrupted

If the gut microbiome is out of balance, the oestrobolome can't do its job properly. Too much oestrogen gets reactivated and recirculated — a pattern associated with oestrogen dominance, fibroids, endometriosis, and difficult perimenopause transitions. Too little and you see symptoms of oestrogen deficiency.

This is why addressing gut health is so often central to addressing hormonal balance — they are not separate systems.

Signs this may be relevant for you

• →Significant bloating in the week before your period
• →IBS symptoms that worsen at certain points in your cycle
• →Heavy or irregular periods alongside chronic digestive issues
• →Perimenopause symptoms accompanied by worsening gut symptoms
• →Mood changes that feel gut-related as much as hormonal

What helps

Supporting the oestrobolome begins with supporting the broader gut microbiome — through a fibre-rich, diverse diet, stress management, and addressing any underlying digestive dysfunction. This is not one-size-fits-all. What works depends on your individual hormonal picture, your unique health profile, and what's actually driving the imbalance.