Become A
Health Detective

Interested in
becoming a
health detective?

The FDN Practitioner Certification Course is the most highly recommended functional nutrition course in the world with a network of over 1500 health practitioners.


Hire A
Health Detective

Interested in
restoring your health?

The FDN Self Care program will help you identify and eliminate the underlying causes instead of just treating the symptoms. Over 25,000 individuals have used FDN to restore their health.

FDN Quote of the Week – From a current FDN Course Trainee

“I truly enjoyed the FDN training and found the program to be very informative and presented in a way that was enjoyable to learn. I am excited to incorporate FDN into my practice as a Registered Dietitian/nutritionist and CLT and to be able to help my clients on a deeper level. My mentor Brandon was wonderful to work with and is a fantastic educator.”

Meg W., Carlsbad, CA

Why take the FDN Course?

The public is crying out for providers to help them with the cause of their health problems instead of just treating the symptoms. So if you’re not using functional lab work, if you can’t identify healing opportunities and resolve most common health complaints at the causal level, your patients and clients will go to someone else who can.

The FDN Certification Course not ony teaches you which labs to use, how to interpret the results and the correct protocols to build health, it provides you with a step-by-step method to engage your clients and patients in a healing process so they actually get the results they want. Anyone can run labs, but without a complete understanding most providers just end up treating the test results instead of the person. FDN allows you to present an opt-in model of self-care to your patients that is easy to follow and exactly what they have been looking for from a health care provider.

FDN protocols are potent, proven, professional and individualized to build health! From the initial intake and patient acceptance step through trouble-shooting resistant cases, you’ll have every tool you need to become a solid health detective. You’ll love the results you get when you practice FDN and so will your patients!

Immersion Training

Learn to fix yourself so you can fix others. You’ll run two labs on yourself and receive your own personalized consultation and protocol. Follow our low-stress business practice model and find out how easy it is to deliver more services to more people and make your practice grow. You don’t need to invent anything, we give you all the patient-education tools that are critical to thier success.

Upon registration you will have 24/7 access to the lessons and granted an entire year to complete the course and become a Certified FDN Practitioner. We’re here to help you succeed!

Satisfaction Guaranteed

We guarantee you’ll not only learn an exciting new approach to helping people, you’ll enjoy doing it. Reed Davis is considered a natural-born teacher and his love of the work is contagious. If, after completing Lesson 1, you choose to withdraw from the FDN Course, you may request a full refund as along as the request is submitted within 30 days of registration and no progression has been made beyond Lesson 1.

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Please see our FAQ page for answers to commonly asked questions

Recommendations from Leaders in the Field of Natural Health Care

Sean Croxton

“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.”
-Sean Croxton

Dr. Sandeep Gupta

“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. Sandeep Gupta, MD

What is FDN?

Functional Diagnostic Nutrition® (FDN) is a holistic discipline that employs functional laboratory assessments to identify malfunctions and underlying conditions at the root of most common health complaints. FDN embraces metabolic individuality and provides a step by step method that allows our patients and clients to achieve repeatable, consistent and successful clinical outcomes.

Learn More About FDN →

Who Can Sign Up?

The FDN course is open to all serious health professionals and puts incredible clinical tools right in your hands — some of the same tools used by integrative physicians. You’ll receive comprehensive training plus case management assistance on specific functional lab tests and protocols. As your skills increase, so will your successful patient outcomes and so shall you build your reputation and business success.

Do you qualify? →

What Will the FDN Course Teach Me?

How to stop chasing symptoms and focus on healing opportunities instead. Which tests uncover the root causes of most common health complaints. How to interpret each lab on an individual basis and correlate with your client/patient. Communicating test results and interpretation to your client in plain English. Functional Diagnostic Nutrition® will teach you all of this and much more.

View the full list of what you will learn with FDN →

What Health Issues Does FDN Address?

When patients come to you with health complaints and say they’ve “Tried everything”, FDN provides a new method by stopping the treatment of symptoms and finding the root cause. Functional Diagnostic Nutrition® address a number of health issues, including high cholesterol, weak muscles, low energy, foggy thinking, sleep issues, depressed moods, high blood pressure, digestive problems, and much more.

See the full list of health issues that FDN can help manage →