About Us

An Empowering Path to Sustainable Wellness

At Root, we're on a mission to bring sustainable and validated functional medicine to the world.

We believe in a personalized approach that empowers you to take control of your health and achieve long-lasting results.

We leverage science and innovative technology plus support from experts to create a functional medicine experience where you can be successful.

Our Story

Founded in 2018, Root emerged from a desire to bridge the gap between traditional medicine and the root causes of health concerns. We saw a space where symptoms were treated, but the underlying imbalances remain unaddressed.

As a team of functional medicine doctors and dietitians, we are dedicated to treating gut health, hormone, autoimmune, and other concerns at the Root cause. We've helped thousands of people and we're ready to share our proven process with everyone.

Get To Your Root Cause

Curious about where you should start your functional medicine journey?

Take our Get to the Root Quiz so you can start working towards reversing disease and optimizing your health at the Root cause.

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Take Control of Your Health

Are you ready to stop chasing symptoms and start feeling better?

Whether you’re optimizing health, managing a condition, or seeking answers, we put the power of functional medicine in your hands.

Explore Membership

Fuel Your Wellness Journey

Looking to elevate your health journey and bridge the gap between good and thriving?

Root Functional Medicine supplements are designed to support your body's natural systems and address your unique needs.

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Meet Our Doctors and Dietitians

Erica Armstrong

MD, IFMCP, Founder/CEO of Root

Author: The PCOS Thyroid Connection. The first book in the U.S. on the connection and root causes of these two conditions.

Hobbies: running, Peloton, walking my dog, playing basketball at the park with my kids - anything active!

Favorite thing about working at Root: We are constantly innovating and improving and I love hearing everyone’s ideas.

Dr. Armstrong is not currently accepting new members.

Emily Cordes

DO, IFMCP

Medical School: Michigan State University College of Osteopathic Medicine
Residency: Internal Medicine & Pediatrics at Western Michigan University School of Medicine
Functional Medicine Training: Certified by the Institute of Functional Medicine

Hobbies: Cooking, Fitness, Downhill Skiing, Cycling, Hiking, Gardening, Spoiling my Labrador Retriever

Favorite thing about working at Root: Practicing at Root allows me to truly get to know each person, put the puzzle of symptoms together and then create a solution as a team (Root member/Physician/Dietitian). This is how I always imagined I would practice medicine. Plus, I get to work with an awesome team and talk about food all day!

Accepting new members in: IA, ID, MN, MT, ND, NV, SD, UT, WA

Michelle Seguin

MD, IFMCP

Medical School: Michigan State University College of Human Medicine

Residency: Marquette Family Medicine Residency Program

Functional Medicine Training: Certified by the Institute of Functional Medicine. Board Certified in Lifestyle Medicine by the American Board of Lifestyle Medicine.

Hobbies: Cooking, gardening, reading, yoga, and spending time with my family on our property in the Keweenaw.

Favorite thing about working at Root: Every person has a unique story. It is an honor to support my patients with
compassion, an open mind, and a personalized approach. I love the opportunity for collaboration and team-based care, which promotes whole health and well-being for all!

Accepting new members in: CA, CT, DE, FL, GA, IN, LA, MA, ME, MI, MN, MO, MS, NC, NJ, NY, PA, TX, VA, VT, WI, WV

Bethanie Thompson

MD, IFMCP

Medical School: Michigan State University College of Human Medicine

Residency: Family Medicine at Michigan State University, Grand Rapids Medical Education and Research Center

Functional Medicine Training: Certified by the Institute for Functional Medicine

Hobbies: traveling with and learning new things with my daughters (like skiing!), walking my sweet black Labrador retriever, cooking, being inspired while exploring nature, Peloton, prayer.

Favorite things about working at Root:

I love solving health puzzles using advanced testing, lifestyle treatments, and modern medicine. Using the root cause approach, at Root I have an opportunity to optimize wellness with an individualized whole-person approach. Besides working with members, I enjoy brainstorming with a bright-minded team of medical physicians and dietitians.

Accepting new members in: AL, AZ, CA, CO, GA, IL, IN, KS, KY, MD, NE, OH, OK, SC, TN, TX

Working with my Root doctor and dietitian has been the most rewarding health experience. Within a month I saw a dramatic reduction in my symptoms and over time they continue to improve.

- Andrea

Katherine Stam

DO, IFMCP

Medical School: Chicago College of Osteopathic Medicine
Residency: Family Medicine at Albany Medical Center
Functional Medicine Training: Certified by the Institute of Functional Medicine

Hobbies: Hiking, yoga, kayaking, paddleboarding, cooking, reading, live music, gardening, and travel

Favorite thing about working at Root: Each person is unique based on their genetics and their environment. Each person has their own story. Functional Medicine allows me to offer personalized care and unique wellness plans.

Dr. Stam is not currently accepting new members.

Amy Masterson

MS, RDN, LD

Hobbies: Cooking, hiking, camping

Favorite food: Can't decide between tacos & potatoes

Favorite thing about working at Root: Always trying to do the right (actually helpful, sustainable) thing even if it's not the sexy thing

Employer who understands overall health and stress management

Working with other amazing women

Always a lot of exciting things going on

Danielle Fiskars-Byers

RDN, LD

Hobbies: My hobbies are running, cooking and baking. I've recently discovered a love of home renovations projects and have been learning new skills along the way. In the summer, I spend as much time as I can on our boat enjoying the water and sunshine!

Favorite Food: I love a good salad with salmon and lots of fresh herbs!

Favorite thing about working at Root: I love looking at each member's unique health needs and goals & then helping them to create a roadmap to feeling their best physically, mentally and emotionally! We all work together at Root to support each other and our clients which creates a culture and environment that is full of warmth.

Lauren Hanson

MS, RDN, LD

Hobbies: Traveling, Peloton, house renovations and spending time with my 3 kids and husband.

Favorite food: Tacos-any and all types.

Favorite thing about working at Root: Root community is filled with members who are passionate about their health. I love having the opportunity to create meaningful and impactful nutrition recommendations while keeping in mind an individual's busy lifestyle. We need to fuel every.single.day and learning how to best do that for our bodies to optimize our health is amazing.

Stephanie Nielsen

MA, RDN, LD

Hobbies: I enjoy traveling, bird watching, moving my body (walking, yoga, weight training, dance), making bean-to-bar craft chocolate with my husband, cooking, and spending time with friends and family.

Favorite Food: There are so many delicious foods, but if I had to pick, I'd narrow it down to dark chocolate (70% or higher please), hummus, and guacamole.

Favorite Thing About Working at Root: I love supporting, connecting, and collaborating with others on their health path through a mind-body-spirit approach that helps them better connect with their body and unique needs and get to the root cause, not just cover up symptoms. I've always hoped to work and brainstorm with an amazing and supportive team of like-minded doctors and dietitians, and I get to do that at Root!

Kelsey Stricklen

MS, RDN

Hobbies: Cooking, Peloton, hiking, paddle boarding, bird watching

Favorite food: Potatoes in any form or tacos. I also love salmon and crab cakes.

Favorite thing about working at Root: Helping people sort through all of the confusing and conflicting nutrition information out there and figuring out what works best for THEIR body. I also love our team approach! Being able to collaborate with other providers on each case is so helpful.

Kelsey is not accepting new members.

My Root dietitian's advice has been very helpful in tweaking things for me to make this a long-term way of living, not a quick fix or "diet".

- M.Q.

Join Us

Become a Premium Root member to get personalized plans from our doctors and dietitians.

As a premium member, receive exclusive one-on-one virtual consultations with our team of functional medicine certified healthcare professionals. We work with you to understand your health goals, address your unique needs, and craft a customized wellness plan.

Explore Our Premium Membership