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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

glyphosate toxicity

Glyphosate Toxicity: What You Don’t Know Might Kill You!

Glyphosate is the active ingredient in the popular herbicide, Roundup.  Glyphosate toxicity is a big deal and what you don’t know just might kill you!  Many people routinely spray their lawns with this chemical totally  unaware of the toxicity.   In the United States, farmers are applying ever increasing amounts to their crops before harvest.  According […]

Pumpkin Spice Waffles

Pumpkin Spice Waffles

Pumpkin Spice has quickly become everyones’ favorite Fall flavor. As soon as the summer comes to an end, pumpkin spice-flavored treats make their appearance just about, well, everywhere. Those treats, however, are usually not the healthiest. So instead of indulging in the seasonal lattes and cookies, consider making your own pumpkin-spiced treats! Start your morning in […]

gut mucosa

Immunology in the Gut Mucosa

Immunology in the Gut Mucosa. The gut mucosa hosts the body’s largest population of immune cells. Nature Immunology in collaboration with Arkitek Studios have produced an animation unravelling the complexities of mucosal immunology in health and disease…. CHECK THIS OUT! The gut mucosa is the largest and most dynamic immunological environment of the body. It’s […]

Garlic Shrimp Zucchini Noodles

Garlic Shrimp Zucchini Noodles

Are you a big fan of zucchini noodles or “zoodles”? If you said yes, then I’m sure you’ll LOVE these Garlic Shrimp Zucchini Noodles! This gluten-free and paleo friendly dish is incredibly simple, yet SO delicious. Savor the summer with fresh ingredients including zucchini, tomatoes, and shrimp. Perfect for a flavorful low-carb lunch or dinner! This Garlic Shrimp Zucchini Noodles recipe was […]

Vanilla Coconut Ice Cream

Vanilla Coconut Ice Cream

Simple, creamy and insanely delicious! I’m absolutely LOVING this paleo Vanilla Coconut Ice Cream recipe from Theresa Nicassio, Author of YUM! If you’ve never made homemade ice cream before, no worries! It’s a lot easier than you would think. With just a few simple ingredients including coconut cream, vanilla extract, and fresh dates, this yummy Vanilla Coconut Ice […]

What people are saying about Dr. Jill Carnahan


Dr. Jill recently treated a family member for a chronic problem that other doctors were unable to uncover. Her persistence and integrative approach was finally what led to a diagnosis after months of no answers. What was even more amazing was Dr. Jill did this while she was 1000 miles away in a new practice! She was able to offer phone consultations and email communications were always returned quickly. She is top notch!


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 :-)


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.