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Dr. Jill

Dr. Jill is Your Functional Medicine Expert!  She uses functional medicine help you find answers to the cause of your illness and the nutritional and biochemical imbalances that may be making you feel ill.

Our Clinic

Dr. Jill Carnahan, Medical Director and Founder of FLATIRON FUNCTIONAL MEDICINE is partnering with Dr. Robert Rountree of Boulder Wellcare, Inc. Her office is located in beautiful Boulder, Colorado. She is currently taking new patients by referral only.

Our Store

It's easier than ever to get what you need to stay healthy! Professional grade products from Thorne Research and Prothera delivered to your door. For instructions on how to order Thorne Research and Prothera/Klaire Labs products online simply click here and follow instructions.

Functional Medicine

Functional medicine addresses the underlying causes of disease, using a systems-oriented approach and engaging both patient and practitioner in a therapeutic partnership. It is an evolution in the practice of medicine that better addresses the healthcare needs of the 21st century.

Dr. Jill’s Blog

Toxic Chemical

Ten Tips To Protect Your Body from Toxic Chemicals

Don’t put anything on your skin you wouldn’t eat! Avoid mainstream consumer skin care, cosmetics and personal care products, period! Need soap? Try natural brands like Dr Bronner’s,  Mrs. Meyers, Watkins or Nubain Heritage. Don’t eat foods made with chemicals you can’t pronounce. Read the ingredients labels. If the list of ingredients is too long […]

Chicken Stock + Soup

Chicken Stock + Soup

Learn how to make homemade Chicken Stock & Chicken Soup thanks to Brandi Mackenzie! Check out her Autoimmune Coaching Program here. “Chicken soup is one of the most nourishing meals you can cook for yourself and your loved ones. There’s a reason you are called to it when sick or healing… it soothes a chilled body, an […]

Pesto Spaghetti Squash

Pesto Spaghetti Squash

Loving this flavorful Pesto Spaghetti Squash recipe by Megan Forbes of Forbes Nutritional Consulting! Did you love this recipe? Don’t miss a single one!! Join today and get your FREE copy of Dr. Jill’s Paleolicious Snack Ideas!

Spinach wraps stuffed with hummus and vegetables

Spinach Wraps Stuffed with Hummus and Vegetables

This savory Spinach Wraps Stuffed with Hummus and Vegetables recipe was shared with me by Conner Middelmann-Whitney from Modern Mediterranean! She says, “After much trial-and-error experimentation, I’ve finally figured out a way to make savory crêpes that can be filled just like store-bought wraps but taste lighter and fresher and are a lot more nourishing, being rich […]

Group of wholesome diet of organic food

Eight Tips to Help You with Healthy Eating in the New Year!

Eight Keys for Healthier Food Choices in the New Year Start where you are and proceed step by step toward the goal. Follow these overall guidelines: Read the label before buying anything. The best indicators of how highly processed a food is can actually be found in the list of ingredients. If what you are buying contains […]

What people are saying about Dr. Jill Carnahan


I wanted to say THANK YOU!!!! When I woke up this morning I hit the lowest I have weighed since I was in High School and my waist size is actually smaller. Not to mention, I feel like a totally different person. My goals and outlook on life have totally changed because of you and your expert analysis, guidance and most of all SUPPORT.

I will never forget sitting in your office and hearing you say “When we take care of the this bacteria over growth you will start loosing weight” and thinking it couldn’t be that easy… but it was. With proper diet, the right supplements and medicine it’s made a greater change in my life then you will every know. I tell everyone I see about… how spectacular you have been. As I stated above you have changed my life and all in less than 6 months!!!!


I believe that people who go to functional medicine docs are typically desperate. We are the patients who are at the end of our proverbial rope, tired of taking drug after drug with no relief, and who traditional MDs don’t know what to do with. We just dream of a life without pain and to be able to function again. Thanks to Dr. Carnahan, I have no signs of the rheumatoid arthritis I was diagnosed with in 2012, and I’m regaining function that was stolen by the MS I was diagnosed with in 1991. I am recovering and regaining my life. Dr. Jill Carnahan is simply phenomenal.


I wanted you to know that as an Integrative Functional Medicine doctor you are 10 out of 10. In fact I tell people that you are the only one in the USA that could effectively treat my condition, and I really believe that :-)

Flatiron Functional Medicine Newsletter
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