Dr. Steven Gundry, renowned heart surgeon and functional medicine pioneer, as he explores the science and clinical application of lectins, aquaporins, and intestinal permeability using Vibrant Wellness testing. With decades of experience and thousands of patient cases, Dr. Gundry breaks down the mechanisms behind food-triggered autoimmunity, leaky gut, and how precision testing can uncover hidden drivers of chronic disease.
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Background and lectin model
- Dr. Gundry’s path into lectins began through heart-transplant and xeno-transplant work, where Neu5Ac, Neu5Gc, and wheat germ agglutinin made sugar-binding proteins clinically important.
- Lectins are sticky proteins in plants and animals that bind specific sugar molecules on blood vessels, gut lining, red blood cells, joints, and nerve junctions.
- Plant lectins function mainly as a defense system against predators, with humans functioning as large plant predators from the plant’s perspective.
- Gluten belongs within the prolamine lectin class and differs from other lectins by source, size, and behavior.
Where lectins come from
- Legumes, grains, and nightshades are the major dietary sources, with peanut handled as a legume and nightshades including peppers, tomatoes, potatoes, goji berries, tomatillos, and tobacco.
- Many lectins are located in the sprouting part of seeds and in seed hulls, with wheat germ agglutinin in wheat germ and hull-associated lectins in wheat, rye, and barley.
- Grains such as millet, sorghum, and fonio differ from wheat, rye, and barley because they lack the same hull problem.
- Lectins resist digestion and ordinary cooking, so food preparation matters more than casual cooking advice.
Gut-barrier and immune mechanism
- Fasano’s zonulin work explains how lectins bind intestinal epithelial cells, loosen tight junctions, create leaky gut, and allow immune activation.
- Molecular mimicry explains how antibodies against dietary lectins can cross-react with human tissue and drive autoimmune patterns.
- Wheat germ agglutinin and aquaporins are small lectins that can cross the gut barrier even without classic leaky gut.
- Modern lectin sensitivity links to microbiome disruption from antibiotics, glyphosate exposure, and loss of older practices such as soaking and fermentation.
Aquaporins and difficult autoimmune cases
- Aquaporins are water-channel lectins shared by plants and humans, including human AQP4 in the gut, blood-brain barrier, and central nervous system.
- Food aquaporins in corn, spinach, potatoes, tomatoes, soybeans, bell peppers, and tobacco have similarity to human aquaporins.
- Food aquaporin antibodies are a possible route to neuroautoimmunity, leaky brain, myelin attack, neuropathy, MS-like patterns, brain fog, and Parkinson’s-like diagnoses.
- Spinach became a recurring concern after it showed up repeatedly in difficult autoimmune and leaky-gut cases that otherwise followed the program.
Testing and clinical workflow
- The Lectin Zoomer is used to find IgG and IgA reactions to lectins from barley, bell pepper, chickpea, corn, cucumber, lentils, lima beans, mung beans, peas, peanuts, potatoes, rice, rye, soybeans, tomato, and kidney beans.
- A positive result is evidence that the lectin crossed the gut wall and met the systemic immune system; a negative result is not permission to eat that food freely.
- Aquaporin testing covers bell pepper, corn, potato, soybean, spinach, tobacco, and tomato, and positive foods are removed while markers are retested over time.
- Initial testing uses broad autoimmune and gut-related markers, including celiac HLA gluten profiling, ANA, rheumatoid factor, anti-CCP3, ENA, Wheat Zoomer, food sensitivity panels, and neuro panels when needed.
- Retesting occurs every three months, with positive foods removed until leaky-gut markers, wheat-component IgG/IgA, and autoimmune markers improve.
- The AHA abstract shows that nine out of ten autoimmune patients with leaky gut resolved leaky gut within a year after lectin-containing gluten-free foods were removed.
- Foods are reintroduced one at a time after markers clear, then Wheat Zoomer and autoimmune profiles are retested if symptoms stay quiet.
Preparation, exposures, and gut repair
- Soaking and pressure cooking are used for beans because lectins leach into soaking water and pressure cooking reduces red-kidney-bean hemagglutinin activity.
- Sprouting is not relied on because lectins are located in the sprouting seed and sprouted grains are worse for vulnerable autoimmune patients.
- Glyphosate and antibiotics are major disruptors of the microbiome that weaken traditional tolerance to lectin-containing foods.
- Gut-repair compounds include N-acetylglucosamine, marshmallow, prebiotics, spore-forming bacteria, and butyrate because colon cells depend heavily on butyrate for energy and barrier function.
- Dried blood spot collection is used when needed because the platform is the same and only the collection method changes.
- Patients do not need to eat gluten or other avoided foods before testing, because long-term avoidance can still leave strong antibody findings.
References
- [00:00] The Plant Paradox — https://www.harpercollins.com/products/the-plant-paradox-steven-r-gundry-md
- [01:00] The Longevity Paradox — https://www.harpercollins.com/products/the-longevity-paradox-steven-r-gundry-md
- [02:00] Potential deleterious role of anti-Neu5Gc antibodies in xenotransplantation — https://doi.org/10.1111/xen.12142
- [03:00] Interaction of Wheat Germ Agglutinin With Sialic Acid — https://doi.org/10.1021/bi00591a038
- [05:00] Karl Landsteiner – Facts — https://www.nobelprize.org/prizes/medicine/1930/landsteiner/facts/
- [08:00] ABO blood group association and COVID-19. COVID-19 susceptibility and severity: a review — https://doi.org/10.1016/j.htct.2021.07.006
- [14:00] Gliadin induces an increase in intestinal permeability and zonulin release by binding to the chemokine receptor CXCR3 — https://doi.org/10.1053/j.gastro.2008.03.023
- [15:00] Modulation of immune function by dietary lectins in rheumatoid arthritis — https://doi.org/10.1017/S0007114500000271
- [15:00] Reaction of Lectin-Specific Antibody with Human Tissue: Possible Contributions to Autoimmunity — https://doi.org/10.1155/2020/1438957
- [16:00] Zonulin and its regulation of intestinal barrier function: the biological door to inflammation, autoimmunity, and cancer — https://doi.org/10.1152/physrev.00003.2008
- [16:00] All disease begins in the (leaky) gut: role of zonulin-mediated gut permeability in the pathogenesis of some chronic inflammatory diseases — https://doi.org/10.12688/f1000research.20510.1
- [20:00] Aquaporin 4 molecular mimicry and implications for neuromyelitis optica — https://doi.org/10.1016/j.jneuroim.2013.04.015
- [23:00] Detection of Antibodies against Human and Plant Aquaporins in Patients with Multiple Sclerosis — https://doi.org/10.1155/2015/905208
- [23:00] Plant and human aquaporins: pathogenesis from gut to brain — https://doi.org/10.1007/s12026-018-9046-z
- [24:00] Aquaporins: Unexpected actors in autoimmune diseases — https://doi.org/10.1016/j.autrev.2022.103131
- [27:00] Effect of Heat Processing on Hemagglutinin Activity in Red Kidney Beans — https://doi.org/10.1111/j.1365-2621.1983.tb14831.x
- [29:00] Detection of IgE, IgG, IgA and IgM antibodies against raw and processed food antigens — https://doi.org/10.1186/1743-7075-6-22
- [33:00] Abstract P219: The Vast Majority of People Who Eat “Gluten Free” for IBS, Celiac, or Autoimmune Disease Have Markers of Leaky Gut That Resolve When “Gluten Free” Foods Containing Lectins, Like Corn, Other Grains, Beans, and Nightshades are Removed From Their Diet — https://doi.org/10.1161/circ.141.suppl_1.P219
- [43:00] Does Glyphosate Affect the Human Microbiota? — https://doi.org/10.3390/life12050707
- [49:00] Butyrate Enhances the Intestinal Barrier by Facilitating Tight Junction Assembly via Activation of AMP-Activated Protein Kinase in Caco-2 Cell Monolayers — https://doi.org/10.3945/jn.109.104638
- [51:00] The Energy Paradox — https://www.harpercollins.com/products/the-energy-paradox-steven-r-gundry-md
I eat raw fish, eggs, and also rarely raw meats like liver. If you are fortunate enough to live in a culture that understands how to prepare it so you don’t fall ill, then I think it’s fine. In terms of fermenting meat, that’s what a dry-aged steak is, or cured pork. I can recommend it. And there are cultures that eat rotten cheese, or tofu.
However, if you have gut issues from consuming an inappropriate diet, then it’s likely that there will be a corresponding impairment of gut function, even if you don’t notice it. For example, vegetarians and vegans tend to have a higher gut pH and a higher incidence of leaky gut. In those cases, it’s best to transition slowly over a period of maybe 8 weeks or so to zero carb, and then if you’d like to incorporate less cooked foods into your diet that you don’t normally eat, then make sure all gut issues are resolved before doing so.
The main thing on zero carb is to eliminate foods that cause issues, and the safest foods are beef, salt, and water.
Makes sense you need a strong gut.Thanks for such a comprehensive reply!
I remember reading news about some tourists getting sick after drinking fermented milk in Mongolia.
I had a lot of trouble after eating cut fruit in Malaysia. Seems to me like food prep that works for the locals may not necessarily mean it works for someone who’s not used to the environment there. I guess our microbiomes have something to do with it too.
yea it happens a lot. They say it’s because our immune system is not used to the different strains of bacteria in other counties. And that we should avoid raw food and tap water when travelling far away.