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Functional Diagnostic Nutrition

Functional Diagnostic Nutrition

June 7, 2011 |  by  |  Nutrition

What is it?

As some of know I’ve been studying to get my certification in Functional Diagnostic Nutrition (FDN). So, I thought I would tell you a little about the program and how excited I am about the services I can now to offer clients.

FDN Mission: “Our mission is to teach as many people as possible how to get well and stay well naturally so they, in turn, may educate others.”

My goal is always, first and foremost, to get everyone eating a healthful diet of whole unprocessed nutrient-dense foods that work for their unique metabolism. That, in itself, works to turn around many many health issues. But sometimes it isn’t always enough. We live in a world of chronic stress (internal and external) that can put us at risk for chronic diseases. Stress can start out with mild symptoms that most of us don’t even relate to stress (digestive, immune, fatigue issues), and if not handled correctly can get ugly and turn into the culprit of many underlying illnesses.That’s where FDN comes in. As an Functional Diagnostic Nutrition Practitioner I now have the tools to dig much deeper to find hidden internal stressors and what the root cause of those are. What they do is assess the functions and pathways of the hormone, immune, digestion, detoxification and intestinal barrier systems. Basically, everything we need to have running smoothly for optimal health.

Here are the tests I can now run for clients:

  • Adrenal Stress Profile (Salivary)
    • Evaluates Steroidal Hormone Balance & pathways
    • Gives us clues about hidden stressors and other malfunctions
  • Metabolic Assessment Profile (Urine)
    • Digestion/Detoxification/Immunity
  • Intestinal Barrier Function Test (Salivary)
    • Assesses the mucosal surface integrity in the gut for antibodies and chronic infection
  • GI Pathogen Screen (Stool)
    • Intestinal microflora screen – tests parasites and pathogens
  • Signet Mediator Release Test
    • Tests for 150 food and chemical allergies

The program also encourages a MetabolicTyping Diet, which I started following about a month ago.  I’ve noticed a definite change in the way I feel after eating to my Metabolic Type (Fast-Oxidizer)…less bloating/gassiness. I also dropped a few pounds by adding more of the foods I assimilate better like high purine proteins and more good quality fat (butter!).  Pretty awesome, right. Amazing how taking out and adding/emphasizing certain foods in your diet can make such a difference. I’m liking it so much my next step is to get certified as a Metabolic Typing Advisor. If I’ve learned anything in all my nutrition studies, it’s solidified that one diet (Vegetarian, Paleo, South Beach, Atkins, etc…) does not work for everyone. Even when eating a clean whole food diet there are foods that work very well with your unique body type and foods (even whole foods) that may not  be what your body needs at that time.

Anyhow, that is what has been keeping me busy lately!

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  1. Hi Laureen,

    I’m an engineer with plans on making a move, at some near future stage, into the world of nutrition. I’m currently halfway through FDN, and was planning on doing CMTA and HMTA next. However I would also like to understand a little bit more about nutritional therapy having listened to an interview with Caroline Barringer recently.

    I’m not sure whether you are an NTP or NTC, but, I was interested in knowing whether you would advise doing one of these over another online course like holistic nutritional consultant or practitioner?

    Or maybe CMTA in conjunction with FDN and HMTA could provide similar expertise?

    Apologies for all of the questions. Hopefully you can provide me with your take on the disciplines I reference, specifically with views to providing an holistic approach to total health.


    Steve Crozier.

  2. Hi Steve,

    Sorry for the delay. Congratulations on the career move into the world of healing…we need more healers! Yes, I would definitely encourage you to look into the Nutritional Therapy Association. I learned so much and found it meshed exactly along my philosophies regarding food. Cathy Eason was my teacher and she is so full of knowledge, it’s amazing. I also did the healing foods certification Caroline Barringer teaches through Immunitrition right after. It was the perfect class to really tie in everything NTA teaches.

    The FDN course I have found to be really helpful with clients who have deep rooted issues that really need some testing done. As Reed says “test, don’t guess” and it’s true. I have recently finished the CMTA course and am adding that into my practice. Knowing a person’s type is the foundation to build their diet on.

    It seems to me you’re on the right path! Please don’t hesitate to contact me for more information.


  3. Im actually considering taking the FDN course myself and it seems its been very valuable for your practice. How long is the program?

  4. I highly recommend the FDN course to expand any wellness practice. It’s helped me to go much further with clients than I, otherwise, would have been able to. It’s a self-paced course so you’re able to go through the modules on your own schedule. It has changed a bit since I’ve taken it and there has been and FDN II course added as well. You also have a huge support group even after completing :).

  5. Hi! I am trying to choose between the FDN course and the NTA course, but don’t know which way to go. Would you recommend one over the other for someone just starting out on getting a true education in this arena?

    Thank you so much!!!

  6. Laureen Wallravin

    Hi Steve, you may have already finished your course (sorry, I’ve been on a bit of a hiatus) but I will say that the NTP course for me was really the foundation for all other courses. It depends on your knowledge base, of course. The NTA has put together a solid course on traditional foods and their importance along with everything you need to do a thorough client intake with the NutriQ software. I did the NTP program and find a lot of value in knowing the Functional Evaluation points to check with clients. If you’re not interested in the F/E the NTC program is the way to go.

    I am, obviously, biased because I had a great experience with my instructor and loved the program plus left with some lifelong friends!

    Best wishes on your journey,


  7. Jennifer Brands

    I’ve been looking into the FDN course. I’m wondering…is there much nutritional information taught in this course? Or is it advised to get nutritional training elsewhere and then FDN to supplement?

  8. Laureen Wallravin

    Hi Jennifer,

    I would definitely recommend other nutritional training and FDN as a compliment to your services. The FDN course is excellent for difficult cases in helping to root out deep issues that only testing can do.

    I hope that’s helpful :).


  9. My daughter is a personal trainer and a certified nutritionist. She is looking to go farther into the holistic,functional, integrative and diagnostic area. I’m trying to help but I think I’m confusing us more than helping. Which would be the best place to continue next. Have been looking at FDN…NTP…DIFM..

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To find out how nutritional therapy can help you, call (805) 242-3677 or schedule your appointment online for a FREE health consultation today. This is a chance for us to get to know each other. We will evaluate your needs and goals, while I will explain my approach to nutrition. I can work one-on-one in person, by phone or video chat for out-of-area clients.
Laureen Wallravin, NTP
San Luis Obispo County
(805) 242-3677

is a Certified Nutritional Therapy Practitioner specializing in a holistic approach to nutrition and total body wellness. She helps clients with digestive, blood sugar, hormone, immune, and detoxification imbalances. Her methods include a Metabolic Type Diet, functional diagnostic testing, and food sensitivity testing (MRT). Laureen’s practice is located in Grover Beach and she serves the surrounding areas of the Central Coast including Pismo Beach, Arroyo Grande, San Luis Obispo, Paso Robles, and Morro Bay.