Isabella Mainwaring I Author & Speaker

Isabella Mainwaring

AUTHOR I SPEAKER I CEO, POWER HAUS

Your Guide to Nervous System Health, Hormone Balance & Reclaiming Your Power

Newsletter

The Movement
Power Haus is a sanctuary for women who are done outsourcing their power and are ready to succeed in a way that feels sustainable, embodied and exquisitely their own.

We believe every woman, no matter her background, deserves to feel regulated, radiant, and deeply resourced.

This is where nervous system work becomes your strategy. Where hormone balance isn’t just about suppressing symptoms - it’s about transforming how you show up in the world.

And where your power isn’t something you strive for. It’s something you live, every single day.
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The Books
Hormone Balance for Dummies is Isabella's debut book with Wiley. A groundbreaking guide that brings nervous system healing, trauma-informed education, and hormone intelligence to men, women and children of all ages and stages of life.

Isabella's second book, The Power We Hold, with Hay House, is due out in November 2025.

Each one invites the reader into a new paradigm of healing, hormone intelligence, and wellbeing.
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New ThetaSomatics™ Practice

Transforming Stress into Softness

An 18-MINUTE PRACTICE to activate oxytocin, your body’s hormone of connection and calm - regulating and rewiring your nervous system for safety, softness, and self-repair. Created by trauma-informed experts. Backed by psychology, somatics, and nervous system science.

🎧 Download now for FREE

From 50-30 day cycles and no more PCOS

When I first came to Isabella, I had PCOS, high cortisol, gut issues, in chronic flight/flight mode, grieving my best friend's death, my dad had a heart attack and I couldn’t process what was going on. With ThetaSomatics™ I've gone from 50-30 day cycles, reduced my PMS, fixed my gut issues, processed my best friend's death and I wake up feeling so thankful to be alive. My stress levels are better than they ever had before, I can cry again, I'm feeling much more confident in dating and I'm finally expressing myself authentically and pursuing my dream career. - Sarah, USA

Cured my 'incurable' migraines

I did The Restore Challenge in December and I had a record of 30 days without a migraine attack. This hasn't happened to me in years - normally I get 2-5 migraines a week! I haven't experienced anything like this before. It's a miracle :) - Essi, Australia

I got my period back after 2 years of being told I was infertile

After being told I would never get my period back...guess what? I've got my period back and just had my sixth healthy cycle in a row. This feels insane! You've changed my life. I want people to know that a big white man behind a desk doesn't actually know everything. - Beth, UK

Isabella knows what she is doing

Isabella always meets me right where I'm at and whenever she provides new content all I think is 'YES!!’. And then whenever I waver, she adds this extra stuff and suddenly the fire is relit again. How she keeps meeting me where I am at on my journey, is a testament to the path she is on. She knows what she is doing and is slaying it. I wish this was taught in schools, imagine the world if her work was part of the curriculum! Isabella deserves all the positivity, success, internal peace and happiness life has to offer. Thank you, Thank you, Thank you - Debbie, Australia

Processed deep grief and got my period back

"My dad passed away about 8 years ago and since then I've been suffering from panic attacks and high levels of stress. l've been doing extensive research and looking for solutions ever since and I can honestly say this is the first thing I've done that has been made an impact...I can't tell you how good that feels! I had also gone off of birth control back in April 2023 and lost my period for about 6 months. I started spotting at around day 26 of the program!" - Laina, California

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ABOUT ISABELLA

Isabella Mainwaring is a former strategy consultant to FTSE 100 and Fortune 500 companies, including global leaders at the World Economic Forum and clients at the forefront of scientific research. She advised CEOs on growth, positioning and transformation at the highest levels of business.

Alongside her corporate career, Isabella spent 18 years immersed in her personal hormone and fertility journey - eventually leaving consulting to study psychology, trauma recovery, hormone science, and nervous system regulation. She went on to develop the ThetaSomatics™ method and the Root Restoration Hormone Healing Model. Two evidence-based frameworks designed to help women address the root causes of burnout, regulate their stress response, rebalance their hormones, and step into their full potential. Today, Isabella helps women create lives, careers, and beliefs that work with their body - not against it. Her approach combines neuroscience, somatics, hormonal health, and subconscious reprogramming to create lasting, grounded transformation.

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