Functional Diagnostic Nutrition

Functional Lab Testing

Functional Lab Testing

Have you ever wanted some hard data about what’s going on in your body? Maybe you’ve tried an elimination diet or tried several different supplements, and you’ve had a hard time telling if these changes are making a difference.

Maybe you’ve had some testing done with your doctor and everything came back “normal.” Of course, normal is what you want; but you know something is off, and a “normal” test gets you no closer to figuring out what’s going on.

A Better Way to Test

Over the past few years, I have gotten really excited about functional lab testing. This type of testing focuses on function in the body rather than diagnosis of disease. By looking at hormone balance, digestive function, food sensitivities, mineral levels, etc., we can get information about dysfunction in the body often before it reaches a clinical level (the point when you end up getting diagnosed with a disease). 

Also, I’ve found that this type of testing can be a wake-up call that motivates us to make some important changes in our diet and lifestyle. Often these changes are things we know we should do, but we usually rationalize that we’re basically fine & it probably wouldn’t make that much difference.

Having quantitative results in our hands helps us understand our bodies better and make our health a priority. It gives us hope that we can actually get better. Testing can give us the answers we’ve been searching for, AND it can help guide our healing efforts in a way that is much more effective. 

The Tests We Offer!

Currently, these are the tests that we offer here at Sweet Water Offering. Let me be clear: All of these tests are issued in the context of a healing support package that includes results interpretation, a holistic protocol, and support in implementing the protocol. We do not just send out test kits without the context of Functional Diagnostic Nutrition, the training that Katie and I have to support you in holistic health.

Lab fees are listed in parentheses after each test.* A brief explanation of our fees can be found at the end of this post. 

  • Functional Adrenal Stress Profile, Plus V – BioHealth 205: This is a saliva test in which you take 4 samples over the course of the day. The results from this test include cortisol and DHEA levels, clues about circadian rhythm and hormone balance, levels of sex hormones and melatonin, and clues about the function of the gut. This test gives a lot of information and is especially helpful in assessing how well your body is handling stress. (Lab fee: $220)
  • Metabolic Assessment Profile – BioHealth 101: This test requires one urine sample. It gives us information about how well the body is digesting fat, the function of the immune system, and how effectively the liver is detoxifying. This is a great initial test, as it can uncover some basic functional deficiencies and help us know how to support you better. (Lab fee: $155)
  • Intestinal Permeability Assessment – Genova IP: This test requires two urine samples. This test gives us clues about the health of the mucosal barrier in the small intestine and possible leaky gut. (Lab fee: $98)
  • Food Sensitivity Testing: We offer a variety of different testing options for food sensitivities. They all require a blood sample.
    • MRT from Oxford Biomedical Technologies – tests for hidden inflammatory responses to 150 different foods and food-chemicals. (Lab fee: $295)
    • Cyrex Labs:
      • Array #3 – measures antibody production (IgG/IgA) against 9 wheat proteins and peptides and 3 essential structure enzymes to help you accurately identify gluten sensitivity.  Considered the “Rolls Royce” of gluten sensitivity panels, Array #3 is the best gluten sensitivity test available because it tests for numerous ways an individual can react to gluten. (Lab fee: $332)
      • Array #4 – measures antibody production (IgG/IgA) against foods that contain gluten (rye, barley, spelt, polish wheat), foods that are known to cross-react with gluten (dairy, yeast, oats, millet, rice, and corn), foods that are newly-introduced and commonly over-consumed on a gluten-free diet (rice, sorghum, quinoa, etc), and foods that are common allergens (corn, soy, eggs, etc). (Lab fee: $232)
      • Array #10 – measures antibody production (IgG/IgA) against 180 different foods (raw and/or modified), foods enzymes, lectins and artificial food additives (including meat glue, colorings, and gums). (Lab fee: $587)
    • Great Plains Laboratory IgG Food Test with Candida – tests for delayed hypersensitivity reactions to 93 foods to identify foods that are capable of causing inflammation that can trigger a large number of adverse reactions as well as for Candida sensitivity. (Lab fee: $219)
    • US Biotek Laboratories IgG Food Sensitivity Test – measures antibody reactions to 96 items. This test requires less blood and is a good choice for young children. (Lab fee: $146)
  • Gut Pathogen Testing: both of these tests are extremely thorough and may uncover gut dysbiosis that has gone undetected in standard medical testing.
    • BioHealth 401H GI Pathogen Screen – looks for the presence of pathogens, including H Pylori, in the gastrointestinal tract. This test requires stool samples from three different days. (Lab fee: $279)
    • GI MAP – The Diagnostic Solutions Laboratory GI Microbial Assay Plus (“GI-MAP”) looks for the presence of pathogens – including H Pylori and other bacteria, parasites, and viruses – in the gastrointestinal tract. The GI-MAP is the first FDA-approved DNA/PCR assay for GI pathogens, making the results more widely accepted. PCR technology provides the ability to identify bacteria, parasites, viruses, and fungi regardless of their viability in the sample. This test requires only one stool sample. (Lab fee: $359, or $179 with insurance)
    • DRG – DRG Laboratory Pathogens Plus looks for the presence of pathogens, including H Pylori, in the gastrointestinal tract. PCR technology provides the ability to identify bacteria, parasites, and fungi regardless of their viability in the sample. This test looks for the presence of toxins, bacterial overgrowth, parasites, fungi, GI health markers (including anti-gliadin indicated in gluten sensitivities), and antibiotic resistance (by drug class). (Lab fee: $395 cash price; or, for U.S. clients, insurance is billed. If denied, the client pays $125.)
  • Hair Analysis Testing: The Analytical Research Labs HTMA (Profile 1) provides insight on mineral and toxic metal levels and how well the body is able to currently excrete toxic metals. This test requires a hair sample. Markers included on this test: Calcium, Magnesium, Sodium, Potassium, Iron, Copper, Manganese, Zinc, Chromium, Selenium, Phosphorus, Nickel, Cobalt, Molybdenum, Lithium, Boron, Lead, Mercury, Cadmium, Arsenic, Aluminum. (Lab fee: $129)
  • The SpectraCell Laboratories Comprehensive Thyroid Panel: provides insight on thyroid function, including information about autoimmunity. This test requires a blood sample. (Lab fee: $100 or $140 to include reverse T3)

In the future, I’ll be highlighting specific tests. I’ll explain why these tests might be exactly what you’ve been looking for and how they can help you get over the symptoms that you struggle with. 

Our fees at Sweet Water Offering are separate from the lab fees. Our charge for three months of support for one test is $300. There is an additional $100 charge for each additional test you do. We give you a TON of support for this low price: interpretation of results, a personalized holistic protocol, regular support, and lots of resources along the way. 

If you’re interested in digging deeper into your own health and getting the answers you’ve wanted for so long, send us an email at Now is a great time to start feeling better!

My name is Candace McCallister. I am the founder of Sweet Water Offering, a holistic health enterprise to support women and families to heal naturally. My background is in biology, counseling, bodywork, and nutrition. My husband and I are helping to start an intentional Christian community in Little Rock, AR. We have three lively and beautiful children.

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