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Gut Health Licensed Nutritionist & Client Manager


Marcie graduated with her Master's Degree in Human Nutrition, completed her undergraduate degree in community health and athletic training, and has been working in the Functional Medicine world for over a decade. She is also the Vice-Chair of the Minnesota Board of Dietetics and Nutrition.

After a 10-year struggle with anorexia, lifelong chronic and complex digestive issues, infertility, and the birth of her twins, Marcie realized that throughout her experiences, nutrition was her saving grace, and she knew she needed to share what she whole-heartedly believed in to help change the lives of others.

Over the course of her career, Marcie has worked with a variety of clients, and her clinical experience spans a myriad of conditions and diseases. Her passion lies in gut health, disordered eating, thyroid health, and female hormones. 

Marcie is a firm believer in educating her clients to make dietary changes that can help them lead the life they desire. She has learned through her own journey, that nutrition has the power to heal, and she uses her own experiences and deep understanding of nutrition to empower her clients to walk their own journey of making changes that are sustainable and maintainable.


Every step, big or small, makes a difference.

Outside of helping to guide her clients back to health, Marcie enjoys watching her twins compete in sports, being creative in the kitchen, and decorating her home. She also loves running, weightlifting, and spending days at the lake or winter evenings all snuggled in with her favorite people.

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Gut Health Licensed Nutritionist Marcie Vaske

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Gut Health Dietitian Nutritionist & Founder


Ashley graduated from her dietetic internship at Boston Harvard's Brigham and Women's Hospital, and pursued continuing education in functional medicine from the Integrative And Functional Nutrition Academy.

In 2016, after working as a dietitian in a variety of settings from Intensive Care Units, to specializing in IV nutrition in California, and eventually landing at a MD-ran private practice in California, a personal change pushed her to move back to Minnesota, where she decided to start Oswald Digestive Clinic. 

She had a unique vision for the clinic, though. She wanted to fill the gaps in the healthcare system... and do it better. At the start, Ashley saw her clients via home visit. Eventually, she got too busy to be making the trips, so she transitioned to telemedicine, at a time before telemedicine was popular. Then, she decided to purchase an electronic health record system that provided an easy app for clients to use. No more having to tediously track meals eaten, because now her clients could simply take a photo using the app!

Fast forward to today, and we now take insurance (due to COVID, insurances started to cover telemedicine!), meaning our clinic is more accessible, allowing our team to grow and help more people improve their gut health using a root cause approach! We are so grateful for all of our clients who choose our clinic to work with, and all of you who refer to us.

Outside of the clinic, Ashley can often be found in nature, traveling or exploring her surroundings, studying a variety of topics, and spending time with the people she meets along the way.

Ashley is not taking new clients at this time.

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Founder & Gut Health Dietitian Ashley Oswald

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Gut Health Dietitian Nutritionist


Katie received her Master's Degree in Human Nutrition from Eastern Michigan University, her Undergraduate Degree in Food Science and Human Nutrition from the University of Maine, and completed her dietetic internship with 1,200 hours of supervised practice in Tennessee. Since then, she has gone on to complete a certification in Functional Nutrition from the Functional Nutrition Alliance, which included an in depth study of the digestive, immune, urinary, cardiovascular, endocrine, nervous, and reproductive systems, all through a functional and holistic medicine lens, with many hours of case study practice.

Katie has been a dietitian now for almost a decade, and during much of this time, she worked as an inpatient hospital and outpatient clinic dietitian, helping a variety of clients to feel better and achieve their goals.

Through her own struggle with chronic fatigue, iron deficiency, mold toxicity, and recurrent mono - which conventional medicine did not have the tools to help her with - Katie came to realize that she wanted to work in a setting that allowed her more flexibility to help clients fully, in the ways she has seen to be effective: by using a holistic / functional / root-cause medical nutrition therapy approach.

So, she left the hospital setting to have her twin babies. During this time, she helped family and friends with their health, and ended up using her knowledge to help her own babies, too, after her infant son started to struggle with severe eczema, food allergies, poor gut health, and sleep disturbances. 

Now that her babies are no longer infants, she is ready to start seeing clients again, and we are so thrilled to have her on board with our clinic. Katie is excited about empowering and supporting her clients to realize how powerful functional nutrition can be, to support their body's own innate ability to heal when given the right tools and support.

Outside of the clinic, Katie loves to cook and bake, to learn and discover new things, to travel and experience new places, and, especially now, loves to spend time at home with her husband and young twins.

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Gut Health Dietitian Nutritionist Katie Bailey

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Gut-Brain Holistic Therapist


Kathleen received her Master's in Social Work at Western New Mexico University, a Master's in Social and Behavioral Science from Wilmington University, and her Bachelor of Science from the University of Delaware where she majored in Human Services and minored in Leadership.


She is passionate about and experienced in integrating psychotherapy techniques with holistic care. She is trained in trauma resolution energy therapy, somatic therapy, EMDR and other trauma healing techniques, inner child work, EFT, mindfulness healing and transformation, muscle clench and release, guided imagery, and more! Alongside more traditional therapy techniques like CBT, DBT, talk therapy, and suicide prevention.


Kathleen has worked with adults, couples, children, and families, in a variety of settings and situations during her 15+ years working in the mental health field.

Like other leaders in the space, Kathleen is exploring new modalities to help those struggling with mental health, as she realizes where conventional methods can help and be effective, but also has seen the limitations of conventional methods.


Like Dr. Mate, she has a strong interest in using and exploring therapies to help individuals heal from trauma, from somatic therapies to ancient plant medicines. She will begin a training course this spring about trauma resolution and energy therapy.

Kathleen is always learning, and holds a beautiful energy with true compassion without judgement, to walk alongside you on your mental health journey. She truly understands the importance of the gut-brain connection, and is a great support to help alongside our gut health dietitian nutritionist team. 

Outside of the clinic, Kathleen loves to work out, meditate, and go hiking near her home. She enjoys spending time with her family, and going to the beach on the summer weekends. And as with most passionate clinicians, she also enjoys learning and researching new holistic therapeutic techniques when not with clients.

Of note: Kathleen only sees adults at ODC. She has worked with children, but feels it's best for children to work with a therapist in person and not via Telemedicine.

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Holistic Gut - Brain Therapist Kathleen

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