10 Nov

All Health Begins in Your Gut!

Let’s Get to the Root of the Problem

The Greek physician Hippocrates, often referred to “the founder of modern medicine,” said, “All disease begins in the gut.” The flip-side of that coin is also true! All health begins in the gut.

When a gardener is looking at a sickly tree, they will very quickly get to the root of the problem: at the roots! The reason we talk about digestion so much on this site is because of what is called the gut-brain axis which is the communication between the brain and the gut.

If you think about it, our gut is the roots of our organism. It is where we absorb nutrition and interface with the external world in an even more intimate way than as in our skin. If we want to get to the bottom of an ailment in a human, then we need to look at how our digestion is working, and what we are eating.

You Are What You Eat

This is so common sense that we have an old adage for it: you are what you eat. We are literally built out of the materials that you put in your mouth, yet we have another saying that says “Common sense is not so common.” We have a staggering epidemic of toxic, altered foods creating disease.

Hippocrates had another famous quote that said “Let food be thy medicine, and medicine be thy food.” We have a lot of information about what food to eat in order to create a healthy brain and body, but in this article, we are going to cover what makes for healthy digestion.

Intestinal Permeability

Often called “the disease your doctor cannot diagnose,” intestinal permeability or Leaky Gut Syndrome, or intestinal permeability, is a condition in which undigested food particles cross into the bloodstream undigested, resulting in inflammation and impaired nutrient absorption. 

Normally, food is partially digested in the stomach before moving on to the small intestine. Nutrients are then absorbed into the blood through the gut lining and transported throughout the brain and body so that they can fuel, maintain, and repair our cells.

With Leaky Gut, whole food particles pass through the intestinal wall and into the blood before being completely broken down or digested.64, 65 As a result, the blood does not recognize these undigested food particles and an immune response occurs just as it would if there were a splinter or any other foreign object in the bloodstream. This immune response causes inflammation, sending signaling molecules called cytokines to the area.

Leaky gut, or intestinal permeability, is an all too common epidemic that slowly eats away at our health, our energy, our immune system, our stress levels, and our brains until we feel seriously impaired. In fact leaky gut is beginning to be recognized as the primary insult and driver of obesity, type 2 diabetes, heart disease, inflammatory bowel disease, cognitive decline, immune dysfunctions and even conditions like Parkinson’s disease.

Why Neurological Conditions?

The same glue that seals our gut is also used to seal our blood-brain-barrier, which is what keeps toxins and other cellular debris out of our brain. As our gut becomes leaky to undigested food particles, so does our brain to waste and other compounds that don’t belong there. Additionally, a 1995 study from the Journal of Neuroimmunomodulation titled “Passage of Cytokines across the Blood-Brain Barrier” found that these inflammatory cytokines are very small and can cross even a healthy blood-brain barrier. The study concluded that: “evidence shows that passage of cytokines across the BBB [blood-brain barrier] occurs, providing a route by which blood-borne cytokines could potentially affect brain function.” This suggests that:

Even in healthy individuals, inflammation anywhere in the body could trigger inflammation in the brain.

A substantial list of triggers may lead to a problem with digestion known as leaky gut (or intestinal permeability), including brain injury and other neurological conditions. Several studies show how important the brain-gut connection is and how neurological issues can lead to digestive problems and vice versa. Improper digestion can lead to neurological disorders as well.49, 50, 51 This means that leaky gut contributes to brain problems and brain problems contribute to leaky gut… It’s a vicious cycle that gets worse and worse if not properly addressed.

Essentially, if you have ever sustained a brain injury or you have any neurological condition, then leaky gut is almost a certainty.52, 53 Additionally, if you experience any brain-based symptoms (such as brain fog, headaches, depression, anxiety, or ADHD), then there is a strong possibility that leaky gut is a factor.54 If you have low energy, skin problems, allergies, joint or muscle pain, experience any digestive symptoms (even as seemingly benign as passing gas or food intolerances), leaky gut is extremely likely.55, 56

It is also becoming clear that for any autoimmune condition to manifest into a diagnosable condition, leaky gut first needs to be present.57, 58, 59 This means that if you have been diagnosed with Hashimoto’s, rheumatoid arthritis, lupus, celiac disease, multiple sclerosis, type 1 diabetes, or any other autoimmune condition, and you have not addressed intestinal permeability (leaky gut), it is very important that you do.

According to clinical studies, there are at least 17 different triggers for intestinal permeability, but the three biggest triggers are casein from milk, gluten from wheat and other grains, and refined sugars and carbohydrates.

Drop the White Poisons like Refined Flour and Sugar

Refined carbohydrates could be flours, sugar, or even fruit juices to excess. Anytime we remove a carbohydrate or sugar from its cellular structure, we run the risk of some harmful microorganism eating it first and causing intestinal permeability.

Once we remove some of our main triggers, then we can start to use certain nutrients like collagen from bone broth to rebuild our intestinal lining. Click these links for Our Full Article on the Benefits of Bone Broth.

While the collagen and elastin are important for rebuilding the intestinal lining, cadherins that are activated by calcium and magnesium ions are important in sealing the junctions between cells in the intestinal tract. These minerals, the aforementioned proteins like collagen, and fiber will turn out to be very important to healing the gut.

Ingredients for Optimal Digestion

The four main nutrients needed for optimal digestion are minerals, enzymes, prebiotics, and probiotics. Minerals activate enzymes which accelerate the chemical reactions of metabolism. Enzymes are there to break down food into less complex parts for better assimilation.


Prebiotics are food for your microbiome. The best prebiotics are found in raw fibrous fruits and veggies, especially raw, leafy, greens, and soluble and insoluble fiber found in produce. When we cook our veggies, they still have many beneficial compounds in them, but most of the fibrous prebiotics are denatured and they do not feed our gut bacteria as effectively. If your digestion can tolerate it, be sure to ingest at least a fist-size of the three types of produce: dark leafy greens, sulfur-rich, and deeply pigmented.

A traditional food from Korea called kimchi that is made of fermented Napa cabbage and other ingredients like peppers and fish sauce.


Probiotics are most often found in fermented food like raw sauerkraut, kimchi, and other lacto-fermented products (like live pickles). probiotic foods also have digestive enzymes Probiotics can also be found in yogurt, but if your goal is to heal intestinal permeability, because milk contains lactose and casein (both of which may contribute to leaky gut), yogurt may be counterproductive.

Read our Full Article on The Microbiome and Probiotics here.

Kombucha is also full of probiotics, but excess sugar is a concern and may also be counterproductive to healing leaky gut syndrome.

To get some awesome probiotics from food while avoiding the excess sugar, we love all of the fermented products produced by Farmhouse Culture! Farmhouse Culture creates excellent lacto-fermented vegetables and drinkable Gut Shots. And lacto-fermented foods not only contain powerful food-based probiotics, but they also contain digestive enzymes to help with your digestion. Their kimchi, sauerkraut, and other fermented products also contain prebiotics, so they are a complete package of goodness!


When it comes to minerals, bone broth is powerful stuff. Stock made the traditional way has been shown to be beneficial for many reasons, and one of these reasons is its mineral content. Minerals are like spark plugs for our metabolism and physiology. They are the catalysts to many biological functions, especially nervous system functions, neurotransmitter production, and muscle contraction. In addition to important minerals, homemade stock also contains collagen, gelatin, glycine, proline, and other nutrients that are important for joint, vision, heart, and brain health. In fact, collagen and gelatin are proteins that can help restore your joints, blood vessels, intestinal tract, your skin, and all connective tissue. This means that bone broth is a powerful elixir to help heal the gut. In addition to all of the benefits already listed, bone broth also contains sulfur compounds like glucosamine sulfate, and chondroitin sulfate. These sulfur compounds have been found to help rebuild joints and reduce pain in them. In healthy people, these sulfur compounds keep joints pliant and flexible so issues with immobility can be prevented before it ever occurs. My favorite broth is made by a company called BrothMasters (use coupon code FEEDABRAIN to save $15).

An RX for Healing Digestion

For some, healing digestion can be done by removing the triggers of intestinal permeability, adding in nutrients that heal the gut lining like bone broth, or powdered products (not my preference) lik L-GlutamineGI Revive Powder,  eating or drinking low-carb lacto-fermented foods and then eating raw veggies (especially raw greens) to support beneficial gut bacteria and facilitating proper digestion.

As many of you know, I am a stickler for double-blind placebo-controlled studies and I like to remain a healthy skeptic when it comes to studies paid for by the company who produces a product. In this case, I gotta say that these studies were very impressive in their metrics and effects.

A Magic Bullet?

Use coupon code FEEDABRAIN for a 10% discount.

One way that we can measure leaky gut is by checking for elevated serum LPS (endotoxin) levels after a meal, along with elevated triglycerides, poor insulin response, and elevated inflammatory cytokines. Elevations in these markers are also shown to be hallmarks of nearly all chronic disease which draws a very suspect correlation that suggests that leaky gut is either a result of, or a contributing factor to almost all chronic disease. For this reason, a study on Metabolic Endotoxemia (clinical leaky gut) was commissioned by Microbiome Labs (formulator of Just Thrive Probiotic) at the University of North Texas.

The study screened nearly 100 healthy college students for Metabolic Endotoxemia (Leaky Gut) by testing bio markers before and after giving a high-caloric meal (fast food). The blood biomarkers that were being screened for were those that are a hallmark of an endotoxic response (LPS, triglycerides, insulin response, and inflammatory cytokines). They discovered that nearly 50%  of the young, healthy, normal weight, symptom-free individuals had a toxic response to simply eating food! This is the same toxic response that is is either a result of, or a contributing factor to metabolic syndrome, obesity, diabetes, autoimmunity, cancers and heart disease.

Those who showed at least a 5-fold endotoxic response (leaky gut), from were randomized to receive either placebo (rice flour) or the commercial spore-based bacillus strains used in Just Thrive Probiotic. No other interventions, diet modifications or lifestyle changes were implemented. The only change was taking these bacillus strains or a placebo.

After 30 days, they were all given the same challenge meal (fast food) and then their blood biomarkers were measured again. The response got worse by about 32% in the placebo group while the active spore based probiotic groups biomarkers had significantly reduced the endotoxic response to the same challenge meal, along with significant reductions in triglycerides, and inflammatory cytokines.

With no other interventions, a 30 day course of these strains effectively fixed their gut lining, favorably altered the immunological response to food, and significantly decreased inflammation in the gut.

This is the first time that a probiotic has been shown to significantly reduce leaky gut and all the associated immune activation, in human subjects. 

This is just one of 9 ongoing clinical trials, so stay tuned for more exciting research from Just Thrive!


  • 64 Arrieta MC, et al. “Alterations in Intestinal Permeability”1512-520.

    65 Fasano, Alessio and Terez Shea-Donohue. “Mechanisms of Disease: the role of intestinal barrier function in the pathogenesis of gastrointestinal autoimmune diseases” 416-22.

    49 Bansal, Vishal et al. “Traumatic brain injury and intestinal dysfunction: uncovering the neuro-enteric axis,” Journal of Neurotrauma 26.8 (2009): 1353-359.

    50 Forsyth, Christopher B et al. “Increased intestinal permeability correlates with sigmoid mucosa alpha-synuclein staining and endotoxin exposure markers in early Parkinson’s disease,” PLOS ONE 6.12 (2011): e28032.

    51 Mass, Michael, Marta Kubera, and Jean-Claude Leunis. “The gut-brain barrier in major depression: intestinal mucosal dysfunction with an increased translocation of LPS from gram negative enterobacteria (leaky gut) plays a role in the inflammatory pathophysiology of depression,”Neuroendocrinology Letters 29.1 (2008): 117-24.

    52 Bansal, Vishal et al. “Traumatic brain injury and intestinal dysfunction: uncovering the neuro-enteric axis” 1353-359.

    53 Forsyth, Christopher B et al. “Increased intestinal permeability correlates with sigmoid mucosa alpha-synuclein staining and endotoxin exposure markers in early Parkinson’s disease.” PLOS ONE 6.12 (2011): e28032.

    54 Petra, Anastasia, et al. “Gut-Microbiota-Brain Axis and its Effect on Neuropsychiatric Disorders with Suspected Immune Dysregulation,” Clinical Therapeutics 37 (2015): 984-995

    55 Dunlop, Simon, et al. “Abnormal Intestinal Permeability in Subgroups of Diarrhea-Predominant Irritable Bowel Syndromes,”The American Journal of Gastroenterology 101 (2006):1288-294.

    56 Jackson, P.G, et al. “Intestinal Permeability In Patients With Eczema And Food Allergy,” The Lancet (1981): 1285-286.

    57 Jenkins, R., et al. “Increased Intestinal Permeability In Patients With Rheumatoid Arthritis: A Side-Effect Of Oral Nonsteroidal Anti-Inflammatory Drug Therapy?,” Rheumatology (1987): 103-07.

    58 Visser, Jeroen, et al. “Tight Junctions, Intestinal Permeability, and Autoimmunity,” Annals of the New York Academy of Sciences (2009): 195-205

  • 75 Banks, WA, AJ Kastin, and RD Broadwell. “Passage of cytokines across the blood-brain barrier,”Neuroimmunomodulation 2.4 (1995): 241-48.

Zach was on his way to being a doctor when a personal health crisis changed all of that. He decided that he wanted to create wellness instead of fight illness. He lost over a 100 lbs through functional nutrition and other natural healing protocols. He has since been sharing his knowledge of nutrition and functional medicine for the last 12 years as a health coach and health educator.

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