GUT FEELINGS: The Hidden Link Between Gut Health and Hormonal Imbalance

By Our Daughters Foundation

GUT FEELINGS: The Hidden Link Between Gut Health and Hormonal Imbalance

By Our Daughters Foundation

1. The Gut Microbiome: Your Internal Ecosystem

Your gut isn’t just a tube for digesting food. It’s home to trillions of bacteria that:

• Help break down food

• Make key nutrients (like B vitamins)

• Train your immune system

• And — importantly — regulate estrogen levels

This bacterial community is called the gut microbiome, and when it’s healthy and diverse, it supports balanced hormones. But when the microbiome is out of balance — a condition called dysbiosis — problems can arise.

2. Estrobolome: The Gut’s Hormone Filte

Inside the gut, a specific group of bacteria known as the estrobolome helps process estrogen. These bacteria produce enzymes (like beta-glucuronidase) that influence how much estrogen is reabsorbed into the bloodstream versus excreted.

When the estrobolome is overactive or underactive, it can lead to:

• Excess circulating estrogen → linked to endometriosis, fibroids, PMS, and breast tendernes

• Too little estrogen → contributing to mood changes, bone loss, and vaginal dryness

So a disrupted gut can directly amplify hormonal imbalances.

3. Inflammation: The Common Denominator

Both gut dysbiosis and endometriosis are associated with chronic inflammation. When the gut barrier is weakened (a condition sometimes called “leaky gut”), it allows inflammatory molecules to pass into the bloodstream. This triggers an immune response — and in people with endometriosis or PCOS, it can worsen pelvic pain, fatigue, and hormonal chaos.

4. What the Research Says

While this field is still developing, early studies have found:

• Women with endometriosis often have altered gut microbiomes compared to those without the condition. [Study: Ata et al., 2019, Scientific Reports]

• A high-fiber, plant-rich diet may help support a more balanced gut flora and improve estrogen metabolism. [Study: Fuhrman et al., 2004, Journal of Nutrition]

• Some researchers are exploring probiotic therapy as a future tool for managing hormone-related conditions.

5. What Can You Do?

You can’t fully control your hormones — but you can support your gut.

Here are some gut-friendly, hormone-supporting habits:

• Eat more fiber: vegetables, fruits, legumes, and seeds

• Avoid excessive sugar and processed foods

• Include fermented foods: yogurt, kefir, sauerkraut, kimchi

• Consider a probiotic — talk to your provider first

• Manage stress — cortisol (the stress hormone) also affects gut balance

• Support liver detoxification (which works with your gut to clear estrogen): eat cruciferous vegetables like broccoli and cauliflower

Final Thoughts

The gut isn’t just about digestion — it’s a key player in how your body handles hormones, pain, and inflammation.

If you’re struggling with endometriosis, PCOS, or unexplained hormone symptoms, supporting your gut might be an empowering place to start.

Want to Learn More?

Here are some helpful articles and research:

The Gut Microbiome and Estrogen Metabolism – NIH

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6471213/

Gut Microbiota and Endometriosis – Scientific Reports

https://www.nature.com/articles/s41598-019-39645-2

How the Gut Influences Hormones – Integrative Medicine Journal

https://www.imjournal.com/

1. The Gut Microbiome: Your Internal Ecosystem

Your gut isn’t just a tube for digesting food. It’s home to trillions of bacteria that:

• Help break down food

• Make key nutrients (like B vitamins)

• Train your immune system

• And — importantly — regulate estrogen levels

This bacterial community is called the gut microbiome, and when it’s healthy and diverse, it supports balanced hormones. But when the microbiome is out of balance — a condition called dysbiosis — problems can arise.

2. Estrobolome: The Gut’s Hormone Filte

Inside the gut, a specific group of bacteria known as the estrobolome helps process estrogen. These bacteria produce enzymes (like beta-glucuronidase) that influence how much estrogen is reabsorbed into the bloodstream versus excreted.

When the estrobolome is overactive or underactive, it can lead to:

• Excess circulating estrogen → linked to endometriosis, fibroids, PMS, and breast tendernes

• Too little estrogen → contributing to mood changes, bone loss, and vaginal dryness

So a disrupted gut can directly amplify hormonal imbalances.

3. Inflammation: The Common Denominator

Both gut dysbiosis and endometriosis are associated with chronic inflammation. When the gut barrier is weakened (a condition sometimes called “leaky gut”), it allows inflammatory molecules to pass into the bloodstream. This triggers an immune response — and in people with endometriosis or PCOS, it can worsen pelvic pain, fatigue, and hormonal chaos.

4. What the Research Says

While this field is still developing, early studies have found:

• Women with endometriosis often have altered gut microbiomes compared to those without the condition. [Study: Ata et al., 2019, Scientific Reports]

• A high-fiber, plant-rich diet may help support a more balanced gut flora and improve estrogen metabolism. [Study: Fuhrman et al., 2004, Journal of Nutrition]

• Some researchers are exploring probiotic therapy as a future tool for managing hormone-related conditions.

5. What Can You Do?

You can’t fully control your hormones — but you can support your gut.

Here are some gut-friendly, hormone-supporting habits:

• Eat more fiber: vegetables, fruits, legumes, and seeds

• Avoid excessive sugar and processed foods

• Include fermented foods: yogurt, kefir, sauerkraut, kimchi

• Consider a probiotic — talk to your provider first

• Manage stress — cortisol (the stress hormone) also affects gut balance

• Support liver detoxification (which works with your gut to clear estrogen): eat cruciferous vegetables like broccoli and cauliflower

Final Thoughts

The gut isn’t just about digestion — it’s a key player in how your body handles hormones, pain, and inflammation.

If you’re struggling with endometriosis, PCOS, or unexplained hormone symptoms, supporting your gut might be an empowering place to start.

Want to Learn More?

Here are some helpful articles and research:

The Gut Microbiome and Estrogen Metabolism – NIH

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6471213/

Gut Microbiota and Endometriosis – Scientific Reports

https://www.nature.com/articles/s41598-019-39645-2

How the Gut Influences Hormones – Integrative Medicine Journal

https://www.imjournal.com/

Join Us: Make a Difference Today

Your support can transform lives. Every donation helps us fund research, advocate for better care, and provide essential grants to women facing debilitating conditions.

Join Us: Make a Difference Today

Your support can transform lives. Every donation helps us fund research, advocate for better care, and provide essential grants to women facing debilitating conditions.

© Our Daughters Foundation - All Rights Reserved

Our Daughters

Follow the Money: We Can Do Better

August 08, 20255 min read

Our Daughters

I want to start by saying: this post is not political. This post is about our shared experiences as women—as a mother of three daughters, a grandmother, and a friend to countless women who have been frustrated and overwhelmed by the current state of our medical system.

We have a common experience—and it needs to be heard and shared.

I was encouraged to write this after reading that the Gates Foundation just pledged $2.5 billion toward women’s health initiatives. But reading the accompanying article published in STAT left me deeply frustrated. The statistics on women’s health haven’t improved enough.

“The Gates Foundation said the goal of the new initiative is to address a long-running deficit in medicine that has disfavored women’s health—to the extent that the ‘typical’ patient described to medical students has traditionally been male.”
— STAT News

In a BMJ article published last week, Ru Cheng, the foundation’s Director of Women’s Health Initiatives, shared that only 1% of global research and development funding is allocated to women’s health issues outside of oncology, and between 2013 and 2023, only 8.8% of NIH-funded research focused exclusively on women.

These are not opinions. These are widely reported, peer-reviewed statistics from respected medical journals. And this is why women with Endometriosis or Adenomyosis are subjected to 8-10 years of medical gaslighting before they are diagnosed. And this is why women with these diseases literally need to be cut open in order to diagnose their disease. It's just not acceptable that laparoscopic surgery is required for diagnosis in 2025. We should be much further along by now. Do you realize that most endometriosis lesions cannot be detected on scans or imaging? I know this can be figured out! Progress is being made, let's push it along.

Men’s and women’s health issues are not treated with the same urgency or investment. That’s not a radical feminist opinion or a political talking point—it’s a follow-the-dollars reality.

The gaslighting women experience around this issue doesn’t just come from doctors. I’ve had people close to me—both men and women—try to argue that women’s health isn’t being overlooked, that maybe we’re exaggerating. But the data is undeniable.

If our mothers, daughters, grandmothers, aunts, and female friends matter—if we believe them and value their lives—then it’s time to stop dismissing their pain. It’s time to pay attention to the statistics, follow the funding, and change our course.

That’s why we launched Our Daughters Foundation:
To fight for
awareness, raise money for research, and provide visibility and hope.

When we first started on this path of setting up the foundation, I was shocked to learn that women weren’t even included in NIH-funded medical trials until 1993. That wasn’t so long ago. If you’re close to my age, that year probably feels recent (Jurassic Park was in theaters and Bill Clinton was president). Incredibly, only 1% of non-cancer healthcare R&D currently targets female-specific conditions.

The Gates initiative is a huge step—but it’s not enough.

Women are still underrepresented in studies involving pain management, cardiovascular disease, and autoimmune conditions—fields where female biology plays a huge role in how we experience disease and respond to treatment. Even more disturbing is the lack of research funding for diseases that exclusively affect women, like endometriosis, adenomyosis, PCOS, and uterine fibroids. These are not rare diseases and conditions, and for many women, they’re life-altering.

For Those Suffering Now...and Our Daughters in the Future

I hope you’ll join us in raising awareness about the women’s health conditions that affect the people we love—and the people you love. These women are not statistics. They’re not being “dramatic” or “too emotional.” They are Mom, Nana, Auntie, Daughter, Friend.

As always, I’ve included data and references for everything I’ve shared above. (Again—thank you, ChatGPT, for helping curate these.) Please see the resources and stats below, which paint a clear picture of the disparities we’re up against.

— There is so much more to say, & even more that we can DO! Please help us make some noise!

With gratitude,
Kara

A Quick History Review

Thanks to ChatGPT research, here’s a timeline that puts things in perspective:1977 – The FDA banned women of childbearing age from participating in early drug trials. The reason? Hormonal “complexity” and fear of pregnancy-related liability (like the thalidomide crisis). That meant chemotherapy, heart meds, pain relief—all tested mostly on men.

1986–1987: The NIH began encouraging researchers to include women in funded studies. This was first published in the NIH Guide for Grants and Contracts

1993 – The NIH Revitalization Act required federally funded trials to finally include women and analyze sex-based differences.

The Pain Gap

Women experience chronic pain more frequently than men, but they’re still less likely to be treated seriously. A 2020 study of over 200,000 patients found:

  • Women consistently face longer delays and lower diagnostic accuracy than men—even for the same symptoms.

  • Women are:

    • Less likely to receive pain medication in the ER

    • Made to wait an average of 16 minutes longer

    • More likely to be told their symptoms are “psychological”

Despite the fact that 70% of chronic pain patients are women, 80% of pain research is still done on male animals or male subjects.

Let that sink in.

Comparison chart

Sources

  1. Reuters – Gates Foundation’s $2.5B women’s health initiative

  2. BMJ: Reimagining Women’s Health Is a Global Imperative

  3. STAT News: Women’s health funding still ignored

  4. FDA 1977 guidance

  5. NIH Revitalization Act

  6. Medidata: History of women in clinical trials

  7. NIH: Endometriosis Funding Summary

  8. SELF: The PCOS Medical Mystery

  9. New Security Beat: VC funding comparison

  10. Statista: Hair Loss Pharma Market

  11. RAND + WHAM Study on Economic Return

  12. arXiv Study on Gender Diagnostic Bias

  13. NIH: Gender Bias in ER Pain Treatment

  14. Scientific American: Sex Bias in Pain Research

Gates FoundationWomen's HealthMoneyFunding
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