Your Gut And Your Hormones

Just when you think you understand hormones, you learn something new. Did you know the hormones that regulate your menstrual cycle are influenced by your gut? Your intestinal bacteria (and their genes), called the microbiome, have so many important functions for your body that some scientists refer to it as a “virtual organ”.

The microbiome synthesizes nutrients and assists with digestion. It releases chemicals that regulate mood and metabolism and immune function, and if all that wasn’t enough, it also helps to control the level of estrogen.

Fun fact: The subset of the microbiome involved with estrogen metabolism is called the estrobolome.

How the microbiome affects estrogen

Estrogen is made primarily by your ovaries. It then circulates through your body to your uterus and breasts and other organs, until it reaches your liver where it’s inactivated. Inactivated estrogen is then sent to the intestine where it is supposed to stay inactivated so it can exit the body through the stool. That is normal, healthy estrogen metabolism.

When certain intestinal bacteria are present, something very different happens. Unfriendly bacteria make an enzyme called beta-glucuronidase, which re-activates estrogen in your gut. That’s a problem because re-activated estrogen then re-enters your body and causes excess estrogen. That is impaired estrogen metabolism.

Fun fact: An unhealthy microbiome is called dysbiosis.

The complication with excess estrogen

Too much estrogen can make periods heavier. And it can also contribute to the long-term risk of conditions such as uterine fibroids and breast cancer.

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How to improve estrogen metabolism through your gut

Fortunately, there are ways to improve the health of the microbiome and to, promote the healthy metabolism of estrogen.

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