Functional Diagnostic Nutrition for Practitioners

Functional Diagnostic Nutrition® (FDN) is a type of detective work that identifies the underlying causes and conditions that cause disease instead of treating symptoms. Using functional lab work, we recognize patterns of imbalance in the body and identify healing opportunities.


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Our functional health coaches work with each client in a health building process using the powerful, proven, protocols of our D.R.E.S.S. for Health Success® program. This natural, holistic approach yields the highest level of positive results for our clients.

We don’t medicate, we educate! We don’t guess, we test! The FDN Certification Course teaches which labs to use and how to interpret the results. Some health coaches may offer labs, but without a complete understanding of how to interpret them functionally, most providers end up treating only the test results instead of the person.

With FDN, you can create simple, customized step by step health restoration plans to your clients. AND GET REAL RESULTS!

Do you know what’s wrong with me?

“Yes! You have malfunctions occurring in your body that are at the root of your health complaints and we can identify them using functional lab work.”

Most of your clients have no idea what is causing their health complaints…and neither do their doctors. They have been chasing their symptoms for years because other providers can’t find the cause or don’t bother to even look for it. FDN health detectives are different. We use functional diagnostic lab work to identify underlying malfunctions and then use a holistic protocol to support that body’s ability to correct those malfunctions.

Can you help me?

“Absolutely! But you must be as committed to restoring your health as I am.”

Customized FDN protocols are based on finding healing opportunities, and not on just treating symptoms. It takes time to rebuild, repair and restore normal function to the body’s cells, organs or systems. Clients typically experience improvements right away. But balancing body chemistry, detoxification, improving digestion and assimilation, and immune system boosting each come with challenges that require persistence and possible course corrections. Restoring hormone balance may happen quickly in some people and take more time in others due to how we each respond to our own chronic stress factors.

Have you helped others like me?

“Yes! FDN health detectives have helped over 100,000 people reach their best level of health in many years.”

Many clients have completely resolved their health conditions even if they were previously diagnosed with serious medical conditions. And your clients can too! There are over 500 FDN health detectives in 30 countries helping thousands of people. We learn how to resolve our own health issues while taking the course, and then we use those tools to help our clients.

Learn more about the Functional Diagnostic Nutrition course.

About Our Founder, Reed Davis

Reed is a Certified Nutritional Therapist and Founder of the Functional Diagnostic Nutrition® (FDN) Certification Course. Reed is known as one of the most successful and experienced clinicians in the world today, having provided functional assessments to over 10,000 clients for hormone levels, bone density testing, adrenal function, digestive problems, immune system and detoxification issues as well as testing for pathogens, food sensitivities and many related health problems.