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Food-first, functional nutrition support

Functional nutrition support for women navigating hormone imbalance, fertility challenges, persistent acne, brain fog, and the demands of motherhood.

A whole body approach to health

You’ve tried everything - diets, supplements, restrictions, and DIY protocols - yet you’re still dealing with:

  • Hormonal imbalance or irregular cycles
  • Digestive issues
  • Skin concerns like eczema or acne
  • Low energy, burnout or brain fog
  • Fertility struggles or postpartum depletion

You sense something deeper is going on and you're here because you're ready to understand what's actually happening. Not just what to do, but why.

An evidence based approach to nourishment

When nourishment, drainage, minerals, and detox pathways are out of balance, your body is working overtime.
Your symptoms are simply the message. My approach helps you restore energy, regulate cycles, support digestion, and rebuild vitality through functional nutrition, comprehensive testing, and education th

I use a functional, whole-body approach that looks at:

How your body receives nourishment
How well it eliminates and detoxifies
Where stress, toxins, or depletion may be affecting your health
What your body needs right now and not what worked for someone else

Explore how we can work together

1:1 Functional Nutrition Coaching

1:1 personalized support over 4-6 months designed to restore energy, regulate cycles, support digestion, or optimize health. Includes comprehensive functional lab testing, cycle education, bi-weekly coaching, and ongoing support as your body adapts and heals.
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Hormone Health Lab Panel + Review

Comprehensive testing and expert interpretation to help you understand what's happening in your body. Includes initial intake, one lab review call to review your lab results, personalized protocol, and 4 weeks of support. Perfect if you sense something deeper is going on but aren't sure what.
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Hey, I’m Kathy!

I'm a virtual Registered Dietitian based out of Florida. I specialize in functional nutrition for women navigating hormone health, fertility challenges, and motherhood.

I went back to school to become a dietitian because I saw the importance of utilizing food as medicine. I wanted to help people change their lives through food and lifestyle. While in school, I found myself questioning what I was learning and soon realized the goal was symptom management NOT healing. For me, symptom management wasn’t enough so I pursued functional training after graduation.


I’ve struggled with disordered eating, hormone imbalance, and infertility. My health challenges paired with my clinical training shape how I show up for every client.

Support for Growing Families

I currently find myself working through eczema and gut health challenges with own children. This has sparked a passion in helping families (mostly, moms) navigate the health of their little ones in a world that tells you ‘it’s normal’.

I also work with families exploring functional nutrition approaches for children dealing with eczema, gut health, and immune challenges. If this is part of your journey, we can talk about that too.

What Working Together Looks Like

Registered Dietitian with Functional Training

My background blends traditional nutrition science with functional approaches that explore root causes through testing and personalized nutrition strategies.

You Learn How Your 
Body Works

Every recommendation comes with education. You'll understand why your symptoms are happening and what to do about them, not just follow a protocol blindly.

Testing That Makes Sense

We use comprehensive functional labs to uncover what your body is trying to tell you. Testing is personalized based on your symptoms, not a one-size-fits-all panel.

Lived Experience Matters

I've navigated fertility struggles, postpartum recovery, and managing eczema with my own kids. I know what it's like to search for answers while trying to hold everything together.

Ready to Understand What's Happening?

Whether you're looking for comprehensive functional lab testing or ongoing support to address the root cause of your symptoms, there's a place to start.

Nourish with Kathy is a virtual functional nutrition practice founded by Katherine Diaz, a Registered Dietitian specializing in women's hormone health, cycle regulation, fertility & pediatric functional medicine support. Kathy helps women and moms get real answers through functional lab testing, personalized nutrition, and root-cause care.

Based in Miami, Florida. Serving clients virtually nationwide.

© 2026 Nourish With Kathy. All Rights Reserved.
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