Constipation is often dismissed as a minor digestive inconvenience. However, for many women, it can be a significant contributor to hormonal imbalance, particularly when it comes to oestrogen. If you struggle with PMS, heavy or painful periods, breast tenderness, cyclical headaches, and bloating alongside sluggish bowels, oestrogen recycling is something to be aware of.
Oestrogen is not only produced and used by the body; it must also be properly metabolised and eliminated, the liver plays a central role in this process. After oestrogen has done its job, it is processed in the liver and packaged for excretion. From there, it is transported via bile into the digestive tract, and out through a bowel movement. Efficient elimination is essential for maintaining healthy hormone balance.
Problems arise when bowel movements are infrequent or incomplete. If stool sits in the colon for extended periods, oestrogen that was prepared for elimination has the opportunity to be reabsorbed back into circulation. This process is known as oestrogen recycling.
A key player in this process is the gut microbiome, specifically a collection of bacteria often referred to as the estrobolome. Certain gut bacteria produce an enzyme called beta-glucuronidase. When levels of this enzyme are elevated, which can occur in cases of constipation, dysbiosis, or poor gut health, it can “unpack” oestrogen that was ready to be excreted. Instead of leaving the body, the hormone is reactivated and reabsorbed into the bloodstream.
Over time, this recycling can contribute to a relative excess of oestrogen in comparison to progesterone, often described as oestrogen dominance. Clinically, this may present as heavy or clotty periods, significant PMS, hormonal acne, fluid retention, breast tenderness, mood changes before menstruation, or conditions such as fibroids and endometriosis.
It is important to recognise that constipation is rarely just about fibre intake. While dietary fibre can be helpful, the root causes of sluggish bowel movements are often more complex. Chronic stress can slow gut motility by keeping the nervous system in a fight-or-flight state. Low stomach acid and poor bile flow can impair digestion. Thyroid imbalances commonly reduce bowel regularity. Dehydration, under-eating, restrictive dieting, and gut dysbiosis can all play a role.
When supporting healthy oestrogen clearance, the goal is not aggressive “detoxing,” but restoring normal physiological function. This begins with establishing regular, comfortable bowel movements, ideally one to two well-formed motions daily. Adequate hydration, sufficient dietary protein, bitter greens, and cruciferous vegetables can support liver processing. Gentle daily movement such as walking encourages motility.
Stress management is another critical, and often overlooked, component. The nervous system directly influences digestive function. When the body feels safe and regulated, gut motility improves, supporting efficient elimination and reducing the likelihood of hormone reabsorption.
Ultimately, hormone balance is not only about what the body produces, but also about what it clears. If digestion is sluggish, even well-designed hormone protocols may fall short. Addressing constipation can be one of the most effective, and foundational, steps in supporting healthier oestrogen balance.
Constipation may be common, but it is not normal. And for many women, improving bowel regularity is a powerful and often transformative part of restoring hormonal health.
Kristan Richards – BHSc Naturopathy
