• Sep 4, 2025

10 Things Women Over 40 Need to Know About Estrogen

“Estrogen decline in perimenopause is not steady. It’s a rollercoaster.” – Leslie Duffy

Do you feel like your body changed overnight? Maybe your weight won’t budge, your joints ache, your period is all over the place, or your moods swing like a rollercoaster? Chances are, estrogen is connected to your symptoms.

Most of us were never taught about what estrogen does in our bodies, and by the time we walk into our doctor’s office, it’s already causing chaos. Then, their jargon can leave you feeling lost, dismissed, or even foolish for not knowing what’s going on with your own body.

Today, I’m breaking down 10 things every woman over 40 needs to know about estrogen and, more importantly, what to do about it. You’ll learn what estrogen dominance is, how estrogen and progesterone work like a seesaw, why high stress makes estrogen dominance worse, and how estrogen works as your “juicy hormone” to keep your skin plump, your joints flexible, and your vaginal tissue healthy. We’re also digging into how estrogen affects your bones, metabolism, histamine response, and more, plus the steps you can take right now to start to optimize your hormone health.

By the end of this episode, you’ll be aware of red flags that may signal estrogen imbalance, which action steps to prioritize, and why estrogen matters for more than your cycle. It’s time to stop guessing, start tracking, and feel empowered in this season of life.


Your Takeaways

  • Why understanding your hormones and advocating for yourself is essential

  • The three types of estrogen and their roles across our life stages

  • Common symptoms of estrogen dominance

  • How estrogen supports collagen, joint flexibility, and tendon strength

  • Estrogen’s role in bone turnover and bone loss prevention

  • The impact of low estrogen on vaginal and bladder health

  • Estrogen’s effect on metabolism and insulin sensitivity

  • How estrogen and progesterone balance each other

  • Why ovulation is critical for hormone health

  • The rollercoaster of estrogen decline in perimenopause

  • Symptoms of high estrogen in perimenopause

  • How estrogen impacts histamine and mast cells

  • Estrogen detoxification and why liver and gut health are significant


Mentioned in this Episode

Free Resources

Fireproof Your Hormones | A real-life approach to calming inflammation and supporting hormone health: Get Your Free Guide

Tracker + Symptom Checklist | Too many symptoms, not enough answers? Grab this free tracker + symptom checklist to start connecting the dots. Get Your Free Tracker


Articles


Ready to go deeper? Explore ways to work with Leslie

Imagine knowing exactly what to focus on for your energy, metabolism, and hormones. That’s what happens inside the 360 Wellness Assessment. For $149, you’ll walk away with a custom roadmap—and if you join any one of Leslie Duffy’s Coaching programs, the call is included in your fee.

Click HERE to book your call.


Leslie Duffy Coaching FREE Resources

→ Explore my free tools and guides HERE


The Mini-Course

→ CALM the Cravings
A mini-course to help you understand and reset the stress-craving cycle without guilt or restriction.
Grab it here


Leslie Duffy Coaching Services

Explore my offers HERE


Let’s connect!

Find me on LinkedIn: www.linkedin.com/in/leslie-duffy-rn

Facebook: https://www.facebook.com/LeslieDuffyCoaching/

Send me a message and follow me on Instagram @LeslieDuffyCoaching

Subscribe to the YouTube Channel: https://www.youtube.com/@TheHormoneShiftShow

Check out Leslie’s favorite things: Amazon Storefront


Got feedback?

I love hearing from listeners! Email your questions or topic requests to Leslie@TheHormoneShiftShow.com

Disclaimer

The content in this podcast and on this website is not a substitute for medical advice from your health care practitioner or your medical team. While I am a licensed healthcare professional, I am not giving you medical advice. This is purely for educational purposes. Please consult your provider for medical guidance specific to you.

Wife to a devoted husband, mom to 3 great kids and a Giant Schnauzer...

About Leslie

Functional Wellness Provider

Leslie Duffy is a Registered Nurse, functional wellness provider, hormone & metabolism coach, and host of The Hormone Shift Show™. She helps ambitious women over 40 improve energy, balance hormones, reduce stress, and finally feel like themselves again through realistic, science-backed wellness strategies.

With over 20 years of experience in health and wellness, Leslie combines functional medicine, behavior change, nervous system support, and hormone education to help women stop starting over and build sustainable habits that actually fit real life