The Most Practical (and well-respected) Functional Lab Training Available Anywhere In The World

“Which labs to use, what they tell you about a person and how to fix the problem”
– Reed Davis
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A family of caring practitioners who understand Metabolic Chaos™ and

why symptoms can be so far removed from the underlying cause

If you are a Health Coach, a Practitioner or just starting to seek a path to help yourself, your family or others,

Functional Diagnostic Nutrition® will give you the edge that no other program can offer…



Transform your life.

Join our community of world-wide practitioners today.

Start the transformation in your life and then start transforming the lives of so many others.


Sign up today and view our curriculum as you move forward in your educational needs. Functional Diagnostic Nutrition® can provide you with all that you need to change your life and the lives of others….

One-on-One Mentors

Every new student is assigned a mentor to work with you as you progress through the course. They will walk you through each facet of the curriculum and it is like having your own personal teacher! We are the only school to offer a mentor program and our graduates are eager to talk about how much it helped them and how glad they are that we offer this!

FDN Connect Anywhere

With our revolutionary FDN Connect program, you can learn anywhere and at anytime you want! Each part of the curriculum is online and available to you 24 hours a day. Access by computer, phone or tablet and learn when it’s convenient for you.

Document Database

We provide all the tools you will need to start your own practice in the exciting world of Functional Diagnostic Nutrition®! As you go through each course, you will receive new tools that will support you in your practice. You will always have access to these tools as they are updated.

Recommendations from Leaders in the Field of Natural Health

Sean Croxton of "Underground Wellness"

Sean Croxton of "Underground Wellness"

“FDN literally changed my life! Not just my life, but the lives of the many people I was able to help by way of using functional lab testing to find the root cause(s) of their symptoms and health challenges. The skills I acquired through FDN training were incredibly unique and allowed me to build a highly successful practice offering real solutions for those who so desperately needed them. One of the best decisions I ever made.”

Dr. Sandeep Gupta, MD

Dr. Sandeep Gupta, MD

“Functional medicine is an emerging new paradigm in medicine. The FDN course provides valuable tools for any practitioner seeking to know the causes and underlying physiological imbalances behind various health conditions, so that one can build up the underlying pillars of health, rather than focusing predominantly on symptom relief. To restore the natural health of the gastrointestinal system and adrenals are two extremely important goals, and this course absolutely provides a strategy for one to create lasting health on those levels. Highly recommended for physicians and non-physicians alike.”

Dr. William Bailey

Dr. William Bailey

Our medical director is an osteopathic physician, board certified in family practice. He has over 20 years of experience in complementary medicine. Dr. Bailey has extensive experience with the proper use of functional lab testing, and provides ongoing support through recommending and reviewing insightful testing approaches, as well as providing guidance on diagnostic options and treatment protocols for unusual or difficult cases.