Hormone Conversion Explained:

Why DUTCH Testing Matters for Women’s Health

If you’ve ever had lab work done and been told, “Your estrogen is low,” or “Your testosterone is high,” you might think, Great, I just need to fix that one hormone, right?

Well… not exactly.

As a certified Functional Diagnostic Nutrition Practitioner in Goshen, NY, I’ve seen how understanding hormone conversion pathways and using advanced tools like the DUTCH Test can provide clarity when traditional bloodwork falls short. Whether you’re here in Orange County, NY, or connecting with me virtually, my goal is to help you understand how your body is truly using and processing hormones.

In this post, we’ll explain how:

• Testosterone can convert into estrogen.
• Progesterone can be redirected into cortisol.
• Thyroid hormones shift in response to stress levels.

If you’ve ever wondered why hormone balance feels like a moving target, it’s because it is. And this is exactly why it’s so important to understand hormone conversion pathways, rather than chasing one hormone at a time.

Why the DUTCH Test Matters

Standard bloodwork shows a quick snapshot of hormone levels, but it doesn’t tell you the full story of how your body is actually using those hormones. That’s why many clients are told their labs look “normal,” yet they still don’t feel well.

Blood vs. Urine Hormone Testing: What’s the Difference?

Blood Testing:

• Measures the total amount of a hormone circulating in the body at that moment.
• Much of this includes hormones bound to carrier proteins (like SHBG for sex hormones or TBG for thyroid). These bound hormones are in storage, not actively being used.
• Only a small fraction is free hormone, which is what your body can actually use. Standard blood tests don’t always show this breakdown.
• Helpful for spotting very high or very low hormone levels, but can miss why symptoms persist when results look “normal.”

Urine Testing (like the DUTCH Test)

• Measures hormone metabolites to show how your body is actually using, breaking down, and clearing hormones.
• Reveals conversion pathways (like testosterone → estrogen, or progesterone → cortisol).
• Tracks cortisol rhythm across the entire day, not just a single moment.
• Provides insight into detox and methylation function, showing how efficiently hormones are eliminated.

In simple terms:

• Blood = quantity in circulation (but much is “tied up” on proteins and not active).
• Urine = quality + function (how your body is using, converting, and clearing hormones over time).

This deeper level of insight is what makes the DUTCH Test such a powerful tool for getting to the root of hormone imbalance.

A Client Story

One client came to me after being on hormone replacement therapy (HRT) for over two years. She was still struggling with fatigue, mood swings, and weight gain. Her doctor had prescribed HRT based solely on symptoms but had never tested her hormone metabolism or pathways.
When we ran the DUTCH Test, it showed that her body wasn’t processing the therapy as expected. Her estrogen and progesterone remained low, and her pathways were imbalanced in a way that explained her persistent symptoms. Once we used her DUTCH results as a roadmap, we were able to support her stress response, detox pathways, and nutrition, leading to real changes she hadn’t experienced before.
This is why I emphasize: you can’t just look at one number on a lab. You need to understand how the body uses, breaks down, and converts those hormones.

The Three Big Conversion Pathways

1. Testosterone to Estrogen: The Aromatase Effect

Both men and women need testosterone and estrogen, but balance is key. The body naturally converts testosterone into estrogen using an enzyme called aromatase.
When aromatase activity becomes too high, due to chronic stress, excess body fat, alcohol and sugar intake, or inflammation, it can lead to imbalance [PMID: 29573619].

In women, this may look like:

• Heavy or painful periods
• Breast tenderness
• Bloating and water retention
• Mood swings and irritability
• Weight gain (hips, thighs)

In men, too much conversion can cause:

• Low energy and motivation
• Loss of muscle mass/increased body fat
• Low libido
• Mood swings and irritability

2. Progesterone to Cortisol: When Stress Steals Your Hormones

Progesterone is the “calming” hormone, supporting menstrual regularity, sleep, and mood stability. But under chronic stress, the body diverts progesterone into cortisol production. This is often called the “pregnenolone steal”.
Because the body prioritizes survival, cortisol always comes first. Over time, this can lead to:

• Short or irregular cycles
• PMS, anxiety, or night waking
• Increased belly fat from high cortisolWorsening estrogen dominance [PMID: 27981182]

This is why stress management isn’t optional when working on hormones; it’s foundational.

3. Thyroid Conversion and Stress

Your thyroid produces mostly T4, the inactive form of thyroid hormone. T4 must be converted into T3 (the active form) to regulate metabolism, digestion, and energy.
When cortisol is high, that conversion slows, and instead T4 gets shunted into Reverse T3 (rT3), a form that blocks metabolism.

Signs that stress is interfering with thyroid function include:

• Persistent fatigue
• Feeling cold often
• Digestive slowdowns and bloating
• Unexplained weight gain
• Thinning hair or dry skin

This is why many thyroid issues are stress-related, and why medication alone often isn’t enough.

Supporting Healthy Hormone Conversion

Instead of chasing one hormone, the real key is supporting the pathways. Some simple steps include:

• Reduce aromatase activity: Strength training, zinc-rich foods (pumpkin seeds, grass-fed beef), limiting alcohol/sugar, and eating more protein + fiber.
• Support progesterone: Stress management, magnesium and B6, healthy fats (avocados, olive oil, nuts/seeds), and avoiding overtraining.
• Protect thyroid conversion: Balance blood sugar, prioritize sleep, include selenium and iodine-rich foods (Brazil nuts, seaweed, fish), and avoid prolonged fasting.

My Approach

Your hormones are constantly in motion, converting, adapting, and responding to your environment. That’s why simply “fixing” estrogen or chasing thyroid numbers isn’t enough. To feel better, you need to understand how your body is actually using those hormones day-to-day.
This is exactly where the DUTCH Test makes a difference. Unlike standard bloodwork, it reveals how hormones are metabolized, converted, and cleared, offering insights that can explain stubborn symptoms like fatigue, mood swings, sleep struggles, or weight changes.
At Functional Healing: The Mind-Body Connection, I help clients in Goshen, NY, across Orange County, and virtually nationwide, uncover these hidden patterns. By combining advanced testing with nutrition and lifestyle strategies, we can move beyond guesswork and create a plan that truly supports your health.

🌿 Key takeaway: Hormone balance isn’t about chasing one lab number, it’s about seeing the bigger picture.

Ready to Take the Next Step?

If you’ve been frustrated with hormone symptoms and haven’t found lasting answers, you don’t need another supplement or quick fix; you need clarity.
Book a complimentary discovery call with me, and let’s uncover the healing opportunities that will help restore your energy, balance your hormones, and support long-term wellness.

With functional healing,
Regina Hewitt, FDN-P, FLNP, NBC-HWC
Certified Functional Diagnostic Nutrition Practitioner
Founder of Functional Healing: The Mind-Body Connection
*Disclaimer: The information shared here is for educational purposes only. It is meant to help you uncover healing opportunities and better understand your body, but it is not a substitute for personalized medical advice. Always consult with your healthcare provider before making changes to your health plan.