Katie T·Mayes

Healthcare meets real life. That’s what I do.

I’m Katherine “Katie” Thompson-Mayes, a board-certified nurse practitioner and the founder of Lifefire™, a hybrid clinic focused on metabolic health, hormone optimization, and sustainable results. I created Lifefire to help people reclaim their health with clarity, evidence-based care, and tools that actually fit into real life.

My approach is rooted in practical, evidence-based care combining weight loss, hormone therapy, and wellness tools that work in real life.

I started as a nurse who wanted more but didn’t know where to begin. Today, I’m the author of Burn Fat, Not Time, the owner of two wellness clinics in Pennsylvania and Delaware, and the creator of programs that help people get results when nothing else has worked.

Whether you’re navigating burnout, weight changes, or just want to feel better in your body, I help you move forward with clinical insight and tools you can trust.

I’ve seen how often metabolism is misunderstood, especially for women. That’s why I created a quick quiz to help you identify your own patterns and know where to start.

Take my free Metabolism Quiz and get a personalized Metabolic Reset Guide instantly.

My story didn’t start with credentials. It started with chaos, weight gain and a choice to do something different.

I was a single teen mom who refused to quit. I worked nights. I raised babies. I lost myself more than once.

But I kept going. I finished school. Graduated from UPenn. Became a nurse practitioner.

After my second baby, I gained 70 pounds. Then I lost it with strategy, not shortcuts.

I built Lifefire™ for people like me. Driven, exhausted, ready for change but tired of extremes.

What I Offer Through Lifefire™

Lifefire™ is more than just one program.
Through my clinics in Pennsylvania and Delaware, I offer personalized care and real results for people who are done guessing.

Some of my most requested services include:

  • Evidence-based medical weight management programs

  • Hormone therapy and optimization

  • Metabolic testing and targeted supplement plans

  • In-clinic tools like red light therapy and PEMF

Every offering is designed to help you take control of your health, without the overwhelm, extremes, or one size fits all advice.

Want to understand how it all fits together?

Of everything I offer through Lifefire™, Evolution is the newest and most hands-on. It’s built exclusively for women and includes guaranteed one-on-one access to me, which is why it lives here on my personal site.

Lifefire™ Evolution is your next chapter.

My newest and most transformative program, designed exclusively for women.

Not a course. Not a diet.

A full-body recalibration rooted in clinical insight and momentum.

Lifefire™ Evolution is built from the same strategies I use with clients in my clinic, reimagined for high achievers, exhausted moms, and women who are tired of starting over.

Clear. Practical. Powerful.
This is what works for your hormones, your metabolism, and your momentum.

“You don’t need more willpower. You need something that actually works.”

— Katie T·Mayes

Let’s build your momentum.

I’m here when you’re ready to stop starting over.