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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

beautiful woman drinks water from a glass and shows delicious

Drinking Pure Water: An Overlooked Key to Optimal Health!

Talking about pure drinking water may seem a bit boring but making sure that you are adequately hydrated and that the water you drink is free of chemicals and toxins is paramount to your health.  Perhaps nothing is more basic but more important! Did you know that blood is 92% water,  brain is 75% water, and muscles are 75% […]

Greek meatball salad

Greek Meatball Salad with Minty Feta-Kefir Dressing

Greek Meatball Salad If you’re a big fan of Greek or mediterranean food, you’ll absolutely love this Greek Meatball Salad with Minty Feta-Kefir Dressing. This gluten-free and paleo dish is perfect for those wanting a healthy lunch or dinner option. The lamb meatballs take this already flavorful salad to the next level and add delicious and healthy protein […]

spinach berry smoothie

Spinach Berry Smoothie

Dr. Jill’s Spinach Berry Smoothie Recipe Don’t skip breakfast! Eating first thing in the morning has a powerful effect on jump starting your metabolism.  If you don’t eat within two hours of waking, your metabolism will slow down to conserve energy. Start the day right with this nutrient packed Spinach Berry Smoothie! This delicious smoothie is […]

Spinach Salad

Spinach Salad with Avocado and Pomegranate

If you’re looking for a quick and healthy lunch option, you’ve found it. This Spinach Salad with Avocado and Pomegranate is simple to make and full of healthy ingredients. The sunflower seeds and spinach in this salad are top-notch sources of magnesium, which enables your body to create dopamine. The avocado’s vitamin B6 produces serotonin, a […]

healthy lifestyle concept - good food, health and life -  reminder words handwritten of sticky notes

Patient Testimonial of Healing – Tonia M.

I love hearing the stories of patients who take control of their health and experience amazing results.  Here is a testimony from one of my  patients… “It’s been a nostalgic weekend for me. Six months ago we were at this same resort in Redding California and my body went fast and furious into toxic overload. […]

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.