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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

Greek Chicken Stew with Cauliflower and Olives

Greek Chicken Stew with Cauliflower and Olives

This DELICIOUS Greek Chicken Stew with Cauliflower and Olives recipe comes from Angela Pifer, Certified Nutritionist! Check out her virtual practice and online programs! 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!

Thanksgiving in the palm of your hand

Gratitude… the key to health and happiness

Just in time for my favorite holiday of Thanksgiving! Did you know gratitude will increase your joy in life and dampen your stress response. It may even enhance your immune function!  Studies show that gratitude is a habit, just like flossing.  Give it a try today… Here’s a few tips for practicing gratitude Keep a gratitude journal – […]

Sick Mixed Race Woman Wearing Winter Hat and Gloves Blowing Her Sore Nose and Holding Cup of Hot Tea Isolated on White.

Fifteen Facts to Fight Flu Naturally

Flu season is just around the corner and there are many ways to enhance your immune system naturally!   Don’t let the headlines scare you… your amazing body was built to fight off infections if you treat it well. You are not destined to get influenza!   I believe for most individuals, there are better ways than […]

Raw Organic Green Acorn Squash

Bacon & Apple Breakfast Hash

This amazing Bacon & Apple Breakfast Hash recipe is brought to you by Brandi Mackenzie! The depth of flavor that comes from this dish really leaves you satisfied. It is a great option for those looking for a savory, egg-free breakfast. The hash can be easily modified for different tastes and seasons, by using summer squash, […]

Gluten-Free Cornbread Dressing

Gluten-Free Cornbread Dressing

This Gluten-Free Cornbread Dressing recipe was shared with me by Gluten Free Gigi just in time for the holidays! Gigi says, “In this recipe for my Gluten-Free Cornbread Dressing, I use my award winning Gluten Free Cornbread recipe and Gluten-Free Biscuits. There are several biscuit recipes you can use here on the site, or you may substitute gluten-free bread […]

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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