Dr. Jill welcomes you!


Dr. Jill

Dr. Jill Carnahan emphasizes an integrative holistic approach to wellness using both conventional medicine and evidence based complementary therapies. This medicine that takes account of the whole person (body, mind, and spirit), including all aspects of lifestyle.

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 scheduling Integrative Functional Medicine consultations for new patients.

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

Summer Chicken Salad

This week’s featured recipe is Summer Chicken Salad! This yummy recipe is super easy to make and Paleo-friendly. It comes from Jaime Ward, CHHC, CGP. You can check out her website at www.MyNutritiousLife.com! 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!

Dr. Carnahan and Hypothyroid Mom Facebook Q&A

Question 1: ‪Brianna Wyckoff‬‬‬-My hair is constantly falling out, but I’m not at all going bald. My home is covered in hair. I get fistfuls in the shower. No doc seems to care. My husband hates it. Why??? Alopecia has many causes, ask your doctor to check thyroid function, kidney, liver function, adrenal function, hormone […]

The Hidden Epidemic:   Is Yeast Overgrowth Destroying Your Health?

Did you know your gut microbes could be dramatically affecting your health? Hey guys! …this is not just for women.  Men, too, commonly suffer from intestinal yeast overgrowth or fungal dysbiosis! Every day we see new research on the effects of unhealthy gut organisms on the brain, the thyroid gland, the nervous system, the immune system, […]

Jane’s Chia Seed Pudding

This week I wanted to share this AMAZING Chia Seed Pudding recipe from the equally-as-amazing Jane Reagan, MEd, RD! Feel free to check out her website: www.EssentialNutrition.com! You can find anything regarding nutrition- whether it be nutrition counseling services, nutrition philosophy, or more delicious recipes like this one! Did you love this recipe? Don’t miss a […]

Kale & Roasted Vegetable Soup

This week’s MOUTH-WATERING Kale & Roasted Vegetable Soup 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!

What people are saying about Dr. Jill Carnahan


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.


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 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!!!!