Headshot of Michelle Seguin, MD, FAAFP, DipABLM, IFMCP a board-certified Family and Lifestyle Medicine physician and certified functional medicine practitioner

Michelle Seguin, MD

MD, FAAFP, DipABLM, IFMCP

Michelle Seguin, MD, FAAFP, DipABLM, IFMCP is a board-certified Family and Lifestyle Medicine physician and certified functional medicine practitioner. With over a decade of experience spanning clinical care, community health innovation, and medical education, she specializes in integrative, root-cause approaches to wellness through food as medicine and lifestyle interventions.
Dr. Seguin currently practices at Root Functional Medicine, a telemedicine-based practice focused on personalized, root-cause care. She previously served in rural primary care in Michigan’s Upper Peninsula, where she secured grant funding to design and implement the region’s first produce prescription program and publish its outcomes research in Health Promotion Practice. As Director of Community Health at the Portage Health Foundation, she expanded regional capacity for food and nutrition initiatives, including farm-to-school programs, expansion of SNAP at local farmers’ markets, and culinary medicine education. She has held academic appointments at Michigan State University College of Human Medicine and Augusta University, where she co-developed curriculum in culinary and lifestyle medicine and received multiple teaching awards. Dr. Seguin has presented at national conferences, including the Institute for Functional Medicine, and publishes a weekly Substack newsletter exploring the intersections of food, health, and seasonal living.

Read Michelle Seguin, MD's Posts

a cup of espresso fell over causing the drink to spill on a surface

Intermittent Fasting Diarrhea: What’s Normal, What’s Not, and How to Prevent It

Quick answer Diarrhea during intermittent fasting is usually caused by what happens…

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A small glass bottle of golden MCT oil on a white surface, representing the question of whether MCT oil breaks an intermittent fast

Does MCT Oil Break a Fast?

“Fat doesn’t break a fast.” That sentence is repeated constantly. It’s also…

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A soft watercolor butterfly shape on a white surface, representing the thyroid gland in the context of fasting and metabolic health

Fasting and Thyroid Health

Thanks to its simplicity and emerging research on its benefits, fasting has…

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A soft sunrise illustration representing the daily cortisol rhythm and its relationship to intermittent fasting

Fasting and Cortisol: The Full Picture

Due to its simplicity, Intermittent fasting (IF) remains a popular way of…

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A white plate with a small watercolor heart shape in red and green, representing cardiovascular health in the context of intermittent fasting and cholesterol

Intermittent Fasting and Cholesterol

If you’ve started or are contemplating intermittent fasting (IF), you may be…

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A glass of celery juice next to a steaming black coffee on a kitchen counter, illustrating the difference between fasting-safe and fasting-breaking drinks

Celery Juice During a Fast Feels Harmless. It Is Not.

Quick answer Celery juice breaks an intermittent fast. It contains 30–70 calories…

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Person tracking food intake on phone while eating alone — intermittent fasting plateau

Why Am I Not Losing Weight on Intermittent Fasting?

Intermittent fasting stalls when the clock becomes the whole strategy. The most…

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A clock and meal prep container representing an intermittent fasting eating window

Do You Lose Muscle When Fasting?

How intermittent fasting connects to muscle loss, muscle building, and muscle maintenance…

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Six espresso cups in a row showing coffee progression from black to milky white, illustrating how coffee add-ins affect fasting

Coffee and Intermittent Fasting: What Every Add-In and Order Actually Does to Your Fast

From early morning brews to mid-afternoon pick-me-ups to after-dinner digestifs, coffee is…

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a clock and a serving of food labeled with calorie count

Calories vs. The Clock: Do I Need to Count on 16:8?

Intermittent fasting didn’t get popular because people love structure. It got popular…

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