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About Functional Diagnostic Nutrition
Functional Diagnostic Nutrition® (FDN) is the premier certification and training program for health coaches and wellness professionals dedicated to mastering the science of functional health.Our mission is to bridge the gap between clinical needs and holistic lifestyle changes. We empower our practitioners to act as true health detectives, utilizing functional lab testing to identify underlying imbalances and root causes rather than merely managing symptoms. By mastering our proprietary investigative process, FDN graduates gain the confidence and competence to resolve metabolic chaos and restore health for even the most challenging cases.Beyond our rigorous curriculum, FDN is a thriving ecosystem of forward-thinking health leaders. We are committed to more than just education; we are dedicated to your professional success. We provide our community with robust business training, ongoing mentorship, and a collaborative network designed to foster long-term career growth and industry authority.Whether you are an aspiring health coach, a licensed practitioner, or a professional looking to elevate your practice, FDN offers the clinical tools and ethical standards needed to achieve consistent results. Join the movement that is redefining wellness. With FDN, you aren’t just learning a method; you are becoming the last resource your clients will ever need.
Functional Diagnostic Nutrition (functionaldiagnosticnutrition.com) has 47 customer reviews on Folks Told, with an average rating of 4.7 out of 5.
FDN taught me what steps I was missing on my own health journey, and in the process of my own healing I learned how to help so many others heal too.
Reed and the mentors are fabulous teachers and I continue to learn & grow with them, even after graduating. The FDN community is so supportive and welcoming.
I'm so grateful that I invested in myself, and now have the foundation to help others. Thanks FDN!
Reply from Functional Diagnostic NutritionNov 25, 2025
Finding those missing steps is often the turning point! We love that your personal journey has now evolved into a foundation for helping others heal. Thank you for the kind words about Reed and the mentors—we’re so grateful you chose to invest in yourself with us! 💙
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Patty
FDN has been a phenominal experience
FDN has been a phenominal experience. Going through the program taught me how to find hidden stressors and not treat the symptoms. We learned the DRESS model and were trained on many different labs. After graduating, we continue to learn through amazing speakers, webinars and trainings that are offered through FDN. Reed Davis is encouraging, hands on and supportive. There is also a supportive FDN community that is genuine and helpful. I am so thankful i chose FDN.
Reply from Functional Diagnostic NutritionNov 25, 2025
Moving away from treating symptoms to finding hidden stressors is the core of our mission! 🕵️♀️ We’re thrilled that the DRESS model and lab training gave you that framework. Reed will be so happy to hear your kind words—he truly cares about every student's success. Thank you for choosing FDN! 🌟
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Leah
The custom support through my trianing…
The custom support through my trianing was superb. The quality & amount of continuing education keeps me at the front of my field & career. It's the only thing that's worked to get my health & keep my health.
Reply from Functional Diagnostic NutritionNov 25, 2025
Hearing that FDN is the "only thing that's worked" for your health is the best feedback we could ask for! 🌿 We are also thrilled that the continuing education is keeping you at the very front of your field. Thank you for trusting us with your personal and professional journey.
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Reed
Amazing program
Amazing program. Every person who ever joined FDN has the highest respect for it and usually recommends it very highly.
Reply from Functional Diagnostic NutritionNov 25, 2025
"Respect" is such a powerful word—thank you. We don't take that lightly! The fact that our graduates recommend the program so highly is the ultimate validation of the work we do. We are grateful to have earned that trust! 🙏
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Sally
FDN empowered me with the knowledge I needed to get my health back
Functional Diagnostic Nutrition (FDN) has been a game-changer in my journey to regain control of my health and destiny. After years of misdiagnoses and feeling overlooked by traditional medical practitioners, FDN has given me the power to be in the driver's seat of my own health.
For years, I struggled with health problems, and felt trapped in the Western world of healthcare because I didn't know of another way. Doctors seemed to miss the underlying causes of my health issues, leaving me feeling frustrated and hopeless. But then I discovered FDN, and it was a turning point in my life.
What sets FDN apart is its unique approach to health assessment. Functional lab testing provided me with invaluable insights that traditional medical tests had missed. These tests revealed underlying imbalances and dysfunctions in my body that were contributing to my health issues. Armed with this knowledge, I was finally able to address the root causes of my health problems instead of just treating symptoms.
The knowledge and training I gained through FDN empowered me to take charge of my own health. I learned how to make targeted lifestyle changes, optimize my nutrition, and implement personalized protocols to support my body's healing processes. I felt like I finally had the tools I needed to take control of my health and well-being.
The transformation was truly remarkable. Through FDN, I was able to identify and address specific issues such as gut dysbiosis, hormonal imbalances, and nutrient deficiencies that had been contributing to my declining health. As I implemented the protocols, I started to see significant improvements in my energy levels, digestion, immune function, and overall vitality.
But perhaps the most powerful aspect of my experience with FDN was the sense of empowerment and control it gave me. I was no longer at the mercy of misdiagnoses and ineffective treatments. FDN gave me the knowledge and tools to advocate for my own health and make informed decisions about my well-being.
Today, I am a living testament to the life-changing power of Functional Diagnostic Nutrition. I am no longer a passive bystander in my own health journey, but an empowered and informed individual who is taking charge of her health destiny. FDN has given me the tools to heal myself, and for that, I am eternally grateful.
Reply from Functional Diagnostic NutritionNov 25, 2025
Moving from feeling "trapped" to being in the "driver's seat" is exactly the shift we strive for! 🚗💨 It is incredible to hear how you used functional testing to finally uncover those root causes like gut dysbiosis and hormonal imbalances. We are honored to have given you the tools to take back your destiny. Thank you for being such a powerful testament to self-healing! 🌟
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Stephanie
I knew I wanted to make an impact…
I knew I wanted to make an impact for people who were struggling with ailments and not getting anywhere in the western medical system. I had been a person suffering from multiple things and didn't get the help I needed from my doctors. I was a self study for many years and knew that there had to be a better way to heal. I couldn't accept the model my doctor was suggesting, and I am so glad I didn't.
With FDN I was given/taught the tools and how to obtain true health in a short period of time. The knowledge and support with FDN was great, but what makes them so wonderful is the option for continued support and learning as a graduate.
I am grateful to be a part of a family and have the ability to impact so many people in the world.
Reply from Functional Diagnostic NutritionNov 25, 2025
We are so glad you didn't settle for the standard model either! 🙅♀️ Turning your years of self-study into a structured toolkit is a game-changer. We love that you feel like part of the family—because you are! 💙 Thank you for using your knowledge to make such a massive impact on those who need it most.
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Kristina
FDN is a comprehensive program that not…
FDN is a comprehensive program that not only incorporates learning about a functional medicine approach, labs that illuminate healing opportunites, but also the business side of working with clients and how to get your practice active.
Reply from Functional Diagnostic NutritionNov 25, 2025
We’re so glad you mentioned the business side! 💼 It’s one thing to master the science and the labs, but knowing how to build a thriving practice is what actually lets you reach the people who need you. 🚀 Thank you for highlighting how comprehensive the training really is!
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Sachin
FDN changed my life and ability to make an impact!
FDN is one of the most comprehensive and liberating programs I've done. Being an FDN and getting the support I need from the team has been invaluable in my ability to get great outcomes and reach people all over the world with my services.
Reply from Functional Diagnostic NutritionNov 25, 2025
"Liberating" is such a powerful description—we love that! 🌎 It is incredible to see how you are using that freedom and support to deliver great outcomes for clients all over the world. Thank you for letting us be part of your global impact! 🚀