Holistic Health Clinic serving Royal Oak & Oakland County | Functional Medicine, Weight Loss & Hormones

Empowering women to thrive with functional medicine, sustainable weight management and holistic wellness.

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This is your time to thrive, and we’re here to make sure you do it with confidence, strength, and a whole lot of self-love.

Each stage of life brings new opportunities to prioritize your health and well-being. At our clinic in Royal Oak, MI, we help you take control of your health journey. Through functional medicine and sustainable weight management, we uncover the root causes of your symptoms, empowering you to reclaim your energy, vitality, and sense of self.

Brain fog, sudden weight gain, and insomnia making you feel like you’re not yourself anymore?-We get it.

You deserve to feel vibrant and energized—not stuck in a cycle of exhaustion and frustration.


You should be able to manage your weight without crash diets or spending hours in the gym.


You should be sleeping through the night, waking up refreshed, and ready to take on your day.


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What if you could learn how to balance your hormones and reclaim your confidence in just a few months—without feeling overwhelmed or guessing what works?

It’s time to stop surviving and start thriving. Let’s make it happen. This is your time.

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We’re redefining what health care means for women like you—because this isn’t about aging, or treating symptoms—we help you take holistic control of your health, your body, and your life so you can live this era fully and unapologetically.

Functional Medicine

We’re not about quick fixes. We dig deep to find the root causes of what’s holding you back, so you can finally feel balanced, energized, and in control of your health.

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Medical weight loss

Ditch the diets that don’t work. We’ll help you fuel your body in a way that feels good, works with your hormones, and fits your real life—because eating well shouldn’t feel like a struggle.

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Nutrition

Nourishing your body shouldn’t feel like a guessing game. Our personalized nutrition plans are designed to support your unique needs—balancing hormones, improving energy, and fueling your body in a way that works for your lifestyle.

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Mindfulness

Life’s chaos doesn’t have to control you. We’ll guide you in simple, doable practices to quiet the noise, manage stress, and reconnect with your calm, grounded self.

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Medication

Sometimes, your body needs a little extra support—and that’s okay. We use medication thoughtfully and as part of a bigger plan to get you feeling your best, faster and sustainably.

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It’s time to reclaim your energy,  confidence, and power, so you can thrive in this incredible chapter of your life.

How it works

01

Start your application

Take the first step toward reclaiming your energy, balance, and confidence by filling out an application here.


02

Discover your personalized program

Together, we’ll uncover the root causes of your symptoms and design a tailored plan to meet your unique needs. Our programs require a minimum 3 month commitment to ensure lasting transformation.


03

Redefine your holistic health

This is your journey to vibrant, sustainable wellness. With our support, you’ll embrace the healthiest, most empowered version of yourself—inside and out.


7 healthy recipes to add to your diet

Our free guide is your gateway to a tastier and healthier way of eating. Inside, you'll find seven handpicked recipes that not only delight your taste buds but also nourish your body.



FUNCTIONAL MEDICINE AND MEDICAL WEIGHT LOSS CLINIC IN ROYAL OAK, MI

Board-certified functional medicine and weight management physicians, female, specialized, with over 10 years of experience.

Hi, we’re Dr. Erin Hendriks and Dr. Maricela Castillo MacKenzie—the founders of Elle MD in Royal Oak, Michigan and your partners in redefining what thriving looks like in your 40s and beyond. Together, we’re on a mission to help women feel vibrant, confident, and in control of their health.


We firmly believe that this stage of life isn’t about settling—it’s about rising. That’s why we started Elle MD: to create a space where women are heard, understood, and empowered with personalized care that addresses the root causes of their health challenges. From stubborn weight gain to hormonal chaos, we’re here to help you reclaim your energy, balance, and confidence.

When we’re not designing customized wellness plans or cheering on your progress, you’ll find Dr. Hendriks experimenting with French cooking and Dr. Castillo MacKenzie traveling with her family.

We both believe life is better with laughter and good friends.

ABOUT US

What our patients say about us...

This is your moment to rise and thrive.

We’re here to help you reclaim your health, your body, and your life—because you deserve nothing less.

Your health journey starts here.

Let’s redefine what’s possible and help you live boldly, unapologetically, and vibrantly every single day.

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On the blog

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August 1, 2025
As we age, changes in our skin can feel sudden and confusing—thinner texture, more dryness, loss of elasticity, and that “tired” look that shows up even after a good night’s sleep. These are natural changes, but they don’t have to be inevitable. In this post, we’re addressing some of the most common questions we get about aging skin, the role of estrogen, and how we integrate evidence-based solutions—like topical hormones and therapeutic skincare—to help restore skin vitality from the inside out. Why does skin change so much with age? Collagen loss starts in our 30s and accelerates during menopause, driven largely by hormonal shifts—especially the decline in estrogen. Estrogen supports hydration, elasticity, and collagen production, so when it drops, the skin becomes drier, thinner, and more fragile. You may also notice increased sensitivity, slower healing, and a duller appearance. What role does estrogen play in skin health? Estrogen isn’t just a reproductive hormone—it plays a critical role in skin physiology. It improves: Collagen production Skin thickness Moisture retention Wound healing Sebum (natural oil) production For some women, topical estrogen can be a safe, localized way to target skin aging—especially in areas like the face, neck, and even vaginal tissue, where estrogen receptors are abundant. We often use compounded low-dose topical estriol or estradiol as part of a customized plan. It’s not about reversing the clock—it’s about optimizing how your skin functions now. Are topical hormones safe? When prescribed appropriately and monitored, topical estrogen for skin use is generally well-tolerated and low-risk. Unlike systemic hormone therapy, these formulations are localized and often used at low doses. We assess your history and current hormone levels before initiating any protocol and monitor your response over time. What else helps aging skin? This is where skincare gets smarter. We look at: Barrier repair: A compromised skin barrier leads to sensitivity, dryness, and inflammation. Inflammation control: Chronic low-level inflammation accelerates aging. Antioxidant support: To neutralize daily oxidative damage. This is why we’re now offering Epionce® in our practice. It’s a dermatologist-developed line that aligns well with a functional approach—focused on skin barrier health, calming inflammation, and restoring a more resilient skin environment. We love it because it’s evidence-based, botanical-forward, and works beautifully alongside hormonal support or other medical treatments.  Where do I start if I’m noticing aging changes? Start with a comprehensive evaluation: hormones, nutrition, stress, and skin history all matter. For some, that means testing estrogen levels and considering topical support. For others, it means addressing gut health, reducing inflammatory load, or rethinking skincare ingredients. We’re here to help you understand what’s changing—and offer personalized tools to help your skin reflect how good you’re starting to feel inside. Aging skin is not just a cosmetic issue—it’s a reflection of internal changes, especially hormone shifts. With thoughtful, integrative care—including hormone support when appropriate and smart topical therapies like Epionce—we can help restore balance and vitality at the cellular level.
July 5, 2025
Is hormone therapy safe for weight loss? Learn the risks, benefits, and how functional medicine helps women lose weight safely and naturally.