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How Menopause Affects Gut Health – And What You Can Do About It

by Valerie Polley | Jun 20, 2025 | 0 comments

Menopause marks the natural end of a woman's reproductive years. Typically occurring between the ages of 45 and 56, it's defined as going 12 consecutive months without a menstrual period. Menopause is often accompanied by a range of physical and emotional changes, including hot flashes, sleep disturbances, and mood shifts. But what many people don't realize is that menopause doesn't just affect reproductive hormones — it also impacts gut health.

Emerging research shows that the decline in estrogen and progesterone levels during menopause can influence everything from how your digestive system functions to the balance of microbes living in your gut. These changes may help explain why many women experience symptoms like bloating, constipation, or other GI issues during midlife.

 In this blog post, we'll explore how hormonal changes during menopause affect the gut, the most common digestive symptoms people face during this time, and evidence-based strategies to support gut health through menopause and beyond.

Understanding the Gut-Hormone Connection

Your gut is home to trillions of microorganisms, collectively known as the gut microbiome, that play a key role in digestion, immune function, and many other important bodily functions. This microbial community is also closely linked with your hormones, including estrogen and progesterone.

 Estrogen and progesterone help regulate gut motility (the movement of food through your digestive tract), influence the integrity of the gut barrier, and impact the composition of your gut microbiome. When these hormone levels decline during menopause, it can disrupt the balance of gut microbes and increase intestinal permeability (gut "leakiness").

One key player in this connection is the estrobolome, a collection of gut bacteria involved in the metabolism and recycling of estrogen. This bidirectional relationship means that changes in gut health can impact hormones (and vice versa), making the gut-hormone connection particularly important during menopause.

How Menopause Affects Gut Health

Levels of estrogen and progesterone naturally decline during menopause, which can impact your gut health.

Menopause and the Gut Microbiome

Hormonal changes during menopause can shift the composition of the gut microbiome. Research shows that microbial diversity often decreases after menopause, which may increase gut permeability (colloquially known as "leaky gut") and promote low-grade inflammation. This state of dysbiosis can not only worsen digestive symptoms but may also contribute to symptoms like fatigue and mood changes.

Increased Risk of GI Symptoms

Many women experience a range of digestive symptoms during menopause, including gas, bloating, indigestion, and unpredictable bowel habits. Some women may develop new or worsened irritable bowel syndrome (IBS) during this hormonal transition. However, more research is needed to fully understand why menopause is associated with digestive symptoms and increased rates of IBS.

Estrogen Metabolism and the Estrobolome

Estrobolome activity may be reduced during menopause, which can impair the body's ability to recycle estrogen. This can contribute to symptoms like fatigue, brain fog, and mood swings, and may also influence breast cancer risk.

Gut Health and Menopause-Related Weight Gain

Weight gain (especially around the midsection) is a common complaint during menopause, and your gut health may play a role. The gut microbiome influences how your body digests food, regulates appetite, and stores fat. A balanced and diverse gut microbiome helps regulate hormones related to hunger and satiety, like ghrelin and leptin. But during menopause, microbial diversity often declines, which may lead to disruptions in these signals.

In addition, some animal studies suggest that changes in the gut microbiome affect the number of calories extracted from food. Hormonal shifts during menopause also promote the accumulation of visceral fat (fat stored around your internal organs), which is not only harder to lose but also promotes inflammation. Changes in the gut microbiome are also associated with the development of visceral fat, highlighting the important relationship between the gut microbiome and metabolic health.

Strategies to Support Gut Health During Menopause

Supporting gut health during menopause can help ease digestive discomfort, improve regularity, and promote overall well-being. Here are some evidence-based strategies to get you started.

Eat More Fiber

Fiber is essential for a healthy gut microbiome, and it helps increase microbial diversity while supporting regular bowel movements. Fiber also binds to excess estrogen in the gut, aiding in its removal from the body and hormonal balance.

 Aim to include a variety of fiber-rich foods like whole grains, flaxseeds, chia seeds, lentils, berries, and leafy greens. These foods not only nourish your gut microbiome, but can also help you feel full for longer and aid with weight management.

Include Fermented Foods

Fermented foods like yogurt, kefir, sauerkraut, kimchi, and tempeh contain beneficial bacteria and bioactive compounds that can help support gut health. Regularly incorporating them into your diet may help reduce bloating and improve digestion.

Manage Stress

Stress has a significant impact on the gut-brain axis and can exacerbate digestive symptoms. Managing stress through mindfulness meditation, deep breathing, or practices like yoga and tai chi can help regulate the gut-brain connection and may reduce gut discomfort.

Incorporate Physical Activity

Regular movement supports healthy digestion by promoting gut motility and facilitating the passage of gas and waste through the intestines. Exercise has also been linked to increased microbial diversity and reduced levels of inflammation.

Stay Hydrated

Adequate hydration is essential for preventing constipation and supporting smooth digestion. Aim for at least 8 cups of fluid daily (keep in mind that you may need more if you're very active or live in a dry climate).

Final Thoughts

Menopause is a time of significant hormonal change, and those changes don't just affect reproductive health. Shifts in estrogen and progesterone can impact gut motility, microbiome diversity, and inflammation, leading to digestive symptoms like bloating, constipation, and gas.

Fortunately, there are many simple, proactive ways to support your gut health during this phase of life. Prioritizing fiber-rich foods, including fermented foods, getting regular exercise, managing stress, and hydrating can all make a meaningful difference. 

If you're struggling with ongoing gut issues or navigating new symptoms in menopause, working with a registered dietitian can help you personalize your health plan and feel more comfortable in your body. Click here to get in touch with us at Blue Tree Nutrition.

Our gut microbiome (the community of trillions of microbes that live in our gut) plays a key role in maintaining metabolic and immune health. Gut dysbiosis occurs when the composition and diversity of our gut microbiome shift. This could include overgrowth of harmful bacteria or a decrease in beneficial bacteria. Gut dysbiosis has been linked to a wide range of negative health outcomes, including increased levels of inflammation and changes in metabolism.

Many people switch to non-nutritive sweeteners like sucralose, aspartame, and stevia for health reasons, and for decades, we've believed that they pass through our bodies without affecting us. But emerging research shows that these compounds interact directly with our gut microbiome and may have potential negative effects on our health. 

This article will review what we currently know about the relationship between non-nutritive sweeteners (including artificial sweeteners and calorie-free natural sweeteners) and the gut microbiome, plus practical advice for navigating sweeteners.

Sucralose

Sucralose (Splenda) is an artificial sweetener commonly used in baked goods, gums, and sugar-free beverages and is approximately 600 times sweeter than sucrose (table sugar). However, recent research has linked it to adverse health effects such as systemic inflammation, metabolic disease, and gut dysbiosis. For example, a 2022 study found that sucralose consumption increased harmful bacteria and reduced beneficial bacteria, which was associated with changes in insulin and glucose levels.

Additionally, a 2025 randomized controlled trial examining the effects of replacing added sugars with sucralose found that people with type 2 diabetes who consumed sucralose experienced reductions in both alpha diversity (the number and types of species present in a single person) and beta diversity (differences in microbial composition between people). Interestingly, the people with overweight and obesity without type 2 diabetes did not experience the same changes.

Overall, animal studies and limited human studies suggest that sucralose may trigger intestinal inflammation, likely through its effects on the gut microbiome. However, since most of the evidence we have comes from test tube or animal studies, these results should be interpreted cautiously.

Aspartame

Aspartame is another commonly used artificial sweetener that is about 200 times as sweet as sucrose. While it does contain some calories, because you don't need much of it to reach the same sweetness levels as sucrose, these calories are negligible.

Like sucralose, most of the research into the gut effects of aspartame has been done in animals. However, we do have some very small human studies. A 2022 randomized controlled trial (RCT) involving 20 healthy adults found that participants taking aspartame showed changes in both probiotic (beneficial) and pathogenic (harmful) bacteria, but the changes were specific to each individual. 

Why the differences? It's likely due to the "responder vs. non-responder" phenomenon. We all have differences in our "baseline" microbiome. While certain bacterial species are common in healthy populations, our microbiome is as unique as a fingerprint. Whether an artificial sweetener has positive or negative effects on our microbiome may depend on which species are already present in our gut, as well as on our habitual diet. This difference in responses makes it very challenging to draw firm conclusions about whether artificial sweeteners are harmful.

Stevia

Many people choose stevia because it's a "natural" zero-calorie sweetener. Studies have shown mixed results regarding the effects of stevia on the gut microbiome. For example, while some in vitro (test tube) and in vivo (animal) studies have reported potentially harmful effects of stevia on the gut microbiome, others have found no impact, and some even reported beneficial effects through inhibition of inflammatory pathways.

Additionally, a 2024 human study found that stevia had no significant effect on the gut microbiome. This highlights the importance of not forming conclusions based solely on test tube and animal studies. Overall, it appears that stevia is a potentially less-harmful alternative to artificial sweeteners like sucralose and aspartame.

Practical Advice for Navigating Sweeteners

Since the research on artificial sweeteners is still evolving, the decision to include or avoid them comes down to personal preference. Here are some tips for including them in your diet in moderation:

  • Try gradually reducing the amount you use: If you typically use two packets of sweetener in your coffee or tea, try gradually reducing to one packet. Our taste buds are highly adaptable, and you may find that one packet is sweet enough once you get used to it.
  • Check your labels: Low- or no-calorie sweeteners (such as sucralose, aspartame, and sugar alcohols like erythritol) are often hidden in low-sugar foods like protein bars, yogurt, and diet sodas. Awareness is the first step to reducing your intake.
  • Rotate your sources: If you do use artificial sweeteners, try switching up the types you use. Since different sweeteners may affect your gut microbiome in different ways, this may reduce the concentrated impact on your gut.
  • Switch to stevia: While animal and test-tube studies show mixed findings, human research indicates that stevia has a limited effect on the gut microbiome, making it a better choice for people seeking to support their gut health.

Another way to support your gut if you regularly use artificial sweeteners is to rebuild gut diversity with fiber and fermented foods, while focusing on whole-food sweeteners.

  • High fiber prebiotic foods (like legumes, whole grains, garlic, onions, asparagus, and under-ripe bananas) act as "fuel" for your healthy gut microbes. Aim to include a variety of these foods in your diet to support the microbes already in your gut.
  • Add fermented foods, like unpasteurized sauerkraut and kimchi, kefir, or kombucha, to your diet. Some fermented foods contain live, beneficial bacterial cultures, while others are rich in "postbiotics" (beneficial compounds like short-chain fatty acids, which are produced when bacteria break down prebiotics).
  • Try using whole-food sweeteners instead of artificial ones. For example, sweeten plain yogurt with vanilla extract and berries or add dates to smoothies or homemade energy bites.

Final Thoughts

Emerging research suggests that certain low- or no-calorie sweeteners, including sucralose and aspartame, may affect the gut microbiome, whereas stevia appears to have a less negative effect. While individual responses can vary with a person's unique baseline microbiome, certain artificial sweeteners may increase inflammation or reduce gut microbiome diversity.

If you need personalized support navigating sweeteners or supporting your gut health, Blue Tree Nutrition can help. Click here to get in touch!

 

 

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Hello, I am

Valerie

My name is Valerie Polley. I am a Indianapolis-based registered dietitian and owner of Blue Tree Nutrition. I consult with clients both local and far away.
I have a bachelor’s degree in nutrition from Purdue University and I have been practicing for 20 years.
I thoroughly enjoy helping clients through their gut health journey. I see a range of GI issues including, but not limited to celiac disease, IBS and SIBO. I also specialize in the FODMAP elimination diet.

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