Dr. Brendan McCarthy

When someone says, "estrogen causes cancer" or "estrogen causes blood clots," what estrogen are they talking about?

In this episode, Dr. Brendan McCarthy explains one of the biggest misconceptions in hormone replacement therapy (HRT): estrogen isn't a single hormone—it's a family of hormones. Understanding the differences between estradiol, estrone, and estriol can completely change how you view your treatment, your lab work, and the conversations you have with your healthcare provider.

You'll learn why the type of estrogen, how it's delivered (oral, patch, injection, pellet), and how it's monitored all matter. Dr. McCarthy also discusses why informed consent goes beyond signing paperwork—it means truly understanding the treatment you're receiving and why it was chosen for you.

In this episode:

What estradiol, estrone, and estriol actually do

Why estrogen is a family—not a single hormone

How oral estrogen differs from patches, injections, and pellets

Why delivery method changes how your body metabolizes estrogen

The difference between bioidentical, synthetic, and animal-derived estrogens

Why lab timing and monitoring are essential for safe HRT

The importance of true informed consent in hormone therapy

Four questions every patient should ask before starting estrogen

When someone says, "estrogen causes cancer" or "estrogen causes blood clots," what estrogen are they talking about?

In this episode, Dr. Brendan McCarthy explains one of the biggest misconceptions in hormone replacement therapy (HRT): estrogen isn't a single hormone—it's a family of hormones. Understanding the differences between estradiol, estrone, and estriol can completely change how you view your treatment, your lab work, and the conversations you have with your healthcare provider.

You'll learn why the type of estrogen, how it's delivered (oral, patch, injection, pellet), and how it's monitored all matter. Dr. McCarthy also discusses why informed consent goes beyond signing paperwork—it means truly understanding the treatment you're receiving and why it was chosen for you.

In this episode:

What estradiol, estrone, and estriol actually do

Why estrogen is a family—not a single hormone

How oral estrogen differs from patches, injections, and pellets

Why delivery method changes how your body metabolizes estrogen

The difference between bioidentical, synthetic, and animal-derived estrogens

Why lab timing and monitoring are essential for safe HRT

The importance of true informed consent in hormone therapy

Four questions every patient should ask before starting estrogen

Hormone therapy isn't one-size-fits-all. The more you understand your hormones, the more empowered you'll be to make informed decisions about your health.

📚 Download the free research resources and citations:
Visit www.protealife.com for episode notes, references, and educational materials.

 

Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more.

If you’re ready to take your health seriously, this podcast is a great place to start.

👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it.

📘 Read Dr. McCarthy’s Book:
Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones
https://www.amazon.com/Jump-Off-Mood-...

📲 Follow Dr. McCarthy:
Instagram: @drbrendanmccarthy
TikTok: @drbrendanmccarthy
Website: www.protealife.com

💬 Got a question or topic for a future episode? Let us know in the comments!

Every day, women are exposed to endless hormone therapy advice on social media, but not all of it is accurate.

In this episode, Dr. Brendan McCarthy explains why fear-driven decisions about hormone replacement therapy (HRT) can lead to unnecessary symptoms, confusion, and setbacks. He shares what he's learned after more than 20 years of prescribing hormones and why education, trust, and an ongoing relationship with your healthcare provider matter more than any viral post.

You'll learn:

Why patients sometimes stop hormone therapy abruptly

How social media can both educate and create unnecessary fear

The difference between nuanced medical advice and absolute claims

Why the route of estrogen matters when discussing clotting risk

The five medication changes you should never make based on a social media post

How informed consent is an ongoing conversation—not just paperwork

Whether you're currently on hormone therapy, considering treatment, or simply trying to make sense of conflicting information online, this episode will help you approach HRT with confidence instead of fear.

If you found this episode helpful, please like, subscribe, and share it with someone who could benefit from a more balanced conversation about hormone health.

📚 Download the free research resources and citations:
Visit www.protealife.com for episode notes, references, and educational materials.

 

Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more.

If you’re ready to take your health seriously, this podcast is a great place to start.

👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it.

📘 Read Dr. McCarthy’s Book:
Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones
https://www.amazon.com/Jump-Off-Mood-...

📲 Follow Dr. McCarthy:
Instagram: @drbrendanmccarthy
TikTok: @drbrendanmccarthy
Website: www.protealife.com

💬 Got a question or topic for a future episode? Let us know in the comments!

Why does one woman feel incredible on hormone replacement therapy while another gains weight, feels anxious, or sees no improvement at all?

The answer isn't simply the hormone—it's how your body processes it.

In this episode, Dr. Brendan McCarthy explains why the route of hormone delivery (oral, topical, injectable, or pellets) dramatically changes how hormones behave in the body. He also breaks down the role of liver metabolism, sex hormone-binding globulin (SHBG), body fat, inflammation, insulin resistance, and lab timing—and why these factors matter when creating an individualized hormone treatment plan.

You'll learn:

Why the same hormone can produce completely different results in different women

How oral, topical, injectable, and pellet hormones affect your body differently

Why "normal" lab results don't always mean your hormones are optimized

The importance of free testosterone vs. total testosterone

How inflammation, body fat, and liver function influence hormone metabolism

Four questions every woman should ask her hormone provider

Why hormone therapy requires ongoing monitoring—not just a prescription

Hormone replacement therapy is never just about writing a prescription. It's about understanding what your body does with it.

 

📚 Download the free research resources and citations:
Visit www.protealife.com for episode notes, references, and educational materials.

 

Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more.

If you’re ready to take your health seriously, this podcast is a great place to start.

👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it.

📘 Read Dr. McCarthy’s Book:
Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones
https://www.amazon.com/Jump-Off-Mood-...

📲 Follow Dr. McCarthy:
Instagram: @drbrendanmccarthy
TikTok: @drbrendanmccarthy
Website: www.protealife.com

💬 Got a question or topic for a future episode? Let us know in the comments!

Many women are handed a prescription for hormone replacement therapy (HRT), sign a consent form, and are sent on their way—but is that really informed consent?

In this episode, Dr. Brendan McCarthy explains why true consent is much more than signing paperwork. Understanding what you're taking, why you're taking it, how it's being monitored, and when your treatment should change are essential parts of safe, personalized hormone therapy.

The 5 Questions Every Patient Should Ask:
✔️ What hormone am I taking?
✔️ Why am I taking it?
✔️ How does it get into my body?
✔️ How will we monitor it?
✔️ What would make us change the treatment plan?

📚 Download the free research resources and citations:
Visit www.protealife.com for episode notes, references, and educational materials.

 

Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more.

If you’re ready to take your health seriously, this podcast is a great place to start.

👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it.

📘 Read Dr. McCarthy’s Book:
Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones
https://www.amazon.com/Jump-Off-Mood-...

📲 Follow Dr. McCarthy:
Instagram: @drbrendanmccarthy
TikTok: @drbrendanmccarthy
Website: www.protealife.com

💬 Got a question or topic for a future episode? Let us know in the comments!

Hormone Replacement Therapy (HRT) is far more than simply taking estrogen or progesterone.

In this first episode of a new 36-part series, Dr. Brendan McCarthy explains why hormone therapy should never be viewed as a one-size-fits-all treatment. From puberty through menopause, he explores how hormones change throughout a woman's life, why lab testing matters, and how personalized care leads to better outcomes.

You'll learn the differences between estradiol, estrone, estriol, progesterone vs. progestins, testosterone therapy, delivery methods, and why true informed consent is essential when making decisions about your health.

In this episode:
✔️ Why "HRT" is an oversimplified term
✔️ The different types of estrogen and why they matter
✔️ Progesterone vs. synthetic progestins
✔️ Testosterone therapy for women explained
✔️ Why hormone testing and lab work are critical
✔️ Oral vs. topical vs. injectable vs. pellet hormone therapy
✔️ How inflammation, stress, sleep, nutrition, and metabolism affect hormones
✔️ Why hormone health starts long before menopause
✔️ What informed consent should actually look like in medicine

This episode lays the foundation for the next 36 episodes, where Dr. McCarthy breaks down hormone therapy into practical, easy-to-understand lessons so you can become a more informed advocate for your own health.

 

📚 Download the free research resources and citations:
Visit www.protealife.com for episode notes, references, and educational materials.

 

Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more.

If you’re ready to take your health seriously, this podcast is a great place to start.

👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it.

📘 Read Dr. McCarthy’s Book:
Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones
https://www.amazon.com/Jump-Off-Mood-...

📲 Follow Dr. McCarthy:
Instagram: @drbrendanmccarthy
TikTok: @drbrendanmccarthy
Website: www.protealife.com

💬 Got a question or topic for a future episode? Let us know in the comments!