A Primal Primer: Leaky Gut Syndrome

In most popular conceptions of human physiology, the gut exists primarily as a passive conduit along which food travels and breaks down for digestion and absorption. It�s where bacteria hang out and digestive enzymes go to work. It�s a �place,� an inert tunnel made of flesh and mucus. Lots of things happen there but the gut itself isn�t doing much.

Except that the�gut serves another very important and active role: as a dynamic, selective barrier between us and the external world with all its nasties. Dynamic in that it responds differently depending on what�s trying to get through. Selective in that it�s supposed to let in good things�and keep out harmful things.

Lining the gut are epithelial cells whose cell membranes fuse together to form protein complexes called tight junctions. The tight junction is the doorman. These are the dynamic, selective parts of the gut. Like the doorman, the tight junction�s job is to discern between what belongs inside and what doesn�t. What gets passage through the gut lining into our body and what is denied. Tight junctions keep out pathogens, antigens, and toxins while admitting nutrients and water.

You can look at the list of conditions commonly associated with elevated intestinal permeability. If you have any or all of them, you may have�leaky gut. Put another way, if you have leaky gut, you may be at a greater risk for some of these. What are they?

Celiac disease: When gluten is broken up into fragments in the gut, those fragments induce the release of zonulin, which tells the tight junctions to become more permeable. This happens to everyone whose guts come into contact with those gluten fragments, but the effect is enhanced in people with celiac. Their gluten-induced leaky gut is way more leaky than it should be, and it stays leaky long after the gluten has been gone. In fact, before direct testing for gluten antibodies and intestinal damage became widespread, a common test for celiac used to be the very same intestinal permeability assessment I just mentioned.

Inflammatory bowel disease (IBD): Patients with Crohn�s disease, an inflammatory bowel disease characterized by severe inflammation of the gut lining, tend to have leaky gut. And in general IBD, which includes Crohn�s and ulcerative colitis, high intestinal permeability precedes the development of the disease.

Irritable bowel syndrome (IBS): As discussed yesterday, IBS patients often show increased gut permeability. Some researchers suggest that leaky gut leads to the kind of chronic, low-level inflammation that characterizes IBS.

Asthma: There is a high prevalence of leaky gut in people with moderate to severe asthma, though researchers aren�t sure whether it�s a cause or consequence of the asthma.

Food allergies and intolerances: The transportation of the food allergen across the gut lining appears to be a necessary step�in the development of a food allergy, and a 2011 review concluded that an overly leaky gut facilitates this�transportation�and leads to�the inducement of allergy.

Autism: Children with autism and their first-degree relatives tend to have abnormal gut permeability, suggesting a gene-environment�component to autism. This is present in some, but not all people with autism.

Rheumatoid arthritis, ankylosing spondylitis, and other autoimmune diseases: Both RA and AS have been linked to leaky gut, and the connection may hold for other autoimmune diseases, too.

Obesity and metabolic syndrome: Both obesity and metabolic syndrome are often�linked with intestinal permeability, and a recent paper explores all the potential mechanisms that might explain the link.

Depression: By some accounts, 35% of depressed patients have leaky gut.

Eczema: Going back as far as 1986, researchers have found leaky gut to be common in eczema patients.

Plus, even if it wasn�t the proximate cause of your health problems, leaky gut probably isn�t helping you get better and you should try to fix it. Multiple feedback loops which make teasing apart cause and effect nearly impossible also make it possible to step in the middle of the loop(s) and break it up.

Steps to Relieve Leaky Gut Syndrome

First, avoid things that might cause it.

Gluten. Gluten begets gliadin releases zonulin induces leaky gut. I discussed this in the celiac section above, but it�s important to reiterate that gliadin has this leaky effect on every gut, not just in celiacs. Celiacs just get it worse than non-celiacs.

Stress. Stress can directly induce leaky gut and stress can take many forms, as we all know. Bad finances, marital strife, unemployment, too much exercise, lack of sleep, extended combat training, and chronic under-eating all qualify as significant stressors with the potential to cause leaky gut, especially chronically and in concert.

Too much alcohol. Ethanol increases intestinal permeability by changing the gene expression of�the proteins involved in tight junction function. If you do drink, be sure to follow best practices and definitely do not drink on an empty stomach. Alcohol also depletes zinc, which is a crucial pro-gut nutrient.

Poor sleep habits. In one recent study, mice�whose circadian rhythms were disrupted were more susceptible to liver damage and alcohol-induced intestinal permeability.

NSAIDs. Non-steroidal anti-inflammatory drugs like aspirin and ibuprofen can be helpful in certain situations, but they are far from benign. One of their worst and most pronounced effects is leaky gut.

Then, take proactive steps to improve gut barrier function.

Take whey protein isolate and glutamine. Both supplements have been shown to reduce leaky gut in patients with Crohn�s disease.

Try resistant starch and other prebiotics. Whether potato starch, green bananas/plantains, mung bean starch, inulin powder, jersualem artichokes, leeks, pectin, or apples, start eating RS and other prebiotics on a regular basis. They increase butyrate production (which reduces intestinal permeability) and support the growth and maintenance of healthy microbial populations.

Take probiotics and/or (preferably �and�) eat fermented food.�Prebiotics are important, but you also need to provide the right gut bugs if you�re deficient. You can do it with both supplements and food. L. rhamnosus and L. reuteri supplements reduce leaky gut and improve symptoms in kids with atopic dermatitis. L. rhamnosus also helps restore the gut barrier in kids with acute gastroenteritis. In rats with leaky gut, yogurt improves gut barrier function.

Get adequate sunlight and/or take vitamin D3 supplements. Vitamin D helps protect against injuries to the intestinal lining, while a vitamin D deficiency promotes intestinal permeability�and inflammation.

Get enough zinc. Oysters, red meat, supplements � zinc supplementation reduces leaky gut.

Make broth, eat gelatinous cuts of meat. I don�t have any scientific references for this one, but it�s such a staple piece of advice in the �healing your gut� scene that it�s worth including. Plus, oxtails are magic, and science can�t quite explain magic just yet.

Exercise intelligently.�Intense, protracted exercise induces leaky gut. This is normally transient and totally manageable, but if taken to the extreme as in chronic cardio, exercise-induced leaky gut can become a chronic condition. The same goes for any kind of chronic exercise. Even too much strength training can probably do it, though you�d have to do a ton of volume without much rest. Meanwhile, moderate exercise improves gut barrier function. The tried and true triumvirate of lifting heavy things, walking lots, and sprinting occasionally is the safest bet.

If all this stuff seems daunting and far-reaching, that�s because it is daunting and far-reaching. The gut affects nearly everything. But look at the bright side: fixing your gut may be the key to good health for many of you. It�s actually quite empowering. Don�t you think?

Sourced from:�marksdailyapple.com

The gut is a fundamental structure in the overall health of the digestive system as it allows for the absorption of nutrients and water. According to each individual person’s diet, the gut will develop specific bacteria which are often essential for proper digestion, however, when an improper diet builds harmful bacteria, digestive complications, such as leaky gut syndrome can occur.

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