(C) Food allergy. Approach this probability as described in the section above on food allergy in patients with normal fasting test results. The difference lies in degree of damage; food intolerant patients with abnormal fasting permeability have more mucosal damage than patients with normal fasting permeability and will take longer to heal.

(D) Bacterial overgrowth resulting from hypochlorhydria, maldigestion, or stasis [41, 127, 128]. This is confirmed by an abnormal hydrogen breath test. Most of the damage resulting from bacterial overgrowth is caused by bacterial enzyme activity. Bacterial mucinase destroys the protective mucus coat; proteinases degrade pancreatic and brush border enzymes and attack structural proteins. Bacteria produce vitamin B12 analogues and uncouple the B12-intrinsic factor complex, reducing circulating B12 levels, even among individuals who are otherwise asymptomatic [129, 130]. In the absence of intestinal surgery, strictures or fistulae, bacterial overgrowth is most likely a sign of hypochlorhydria resulting from chronic gastritis due to Helicobacter pylori infection. Triple therapy with bismuth and antibiotics may be needed, but it is not presently known whether such treatment can reverse atrophic gastritis or whether natural, plant-derived antimicrobials can achieve the same results as metronidazole and ampicillin, the antibiotics of choice.

Bacterial overgrowth due to hypochlorhydria tends to be a chronic problem that recurs within days or weeks after antimicrobials are discontinued. Keith Eaton, a British allergist who has worked extensively with the gut fermentation syndrome, finds that administration of L-histidine, 500 mg bid, improves gastric acid production in allergic patients with hypochlorhydria, probably by increasing gastric histamine levels [personal communication]. Dietary supplementation with betaine hydrochloride is usually helpful but intermittent short courses of bismuth, citrus seed extract, artemisinin, colloidal silver and other natural antimicrobials are often needed. The first round of such treatment, while the patient is symptomatic, should last for at least twelve weeks, to allow complete healing to occur. Repeat the lactulose/mannitol assay at the end of twelve weeks, while the patient is taking the antimicrobials, to see if complete healing has been achieved. The most sensitive test for recurrence of bacterial overgrowth is not the lactulose/mannitol assay but the breath hydrogen analysis.

Atrophic Therapies

Many naturally occurring substances help repair the intestinal mucosal surface or support the liver when stressed by enteric toxins. Basic vitamin and mineral supplementation should include all the B vitamins, retinol, ascorbate, tocopherol, zinc, selenium, molybdenum, manganese, and magnesium. More specialized nutritional, glandular and herbal therapies are considered below. These should not be used as primary therapies. Avoidance of enterotoxic drugs, treatment of intestinal infection or dysbiosis, and an allergy elimination diet of high nutrient density that is appropriate for the individual patient are the primary treatment strategies for the Leaky Gut Syndromes. The recommendations that follow are to be used as adjuncts:

(1) Epidermal Growth Factor (EGF) is a polypeptide that stimulates growth and repair of epithelial tissue. It is widely distributed in the body, with high concentrations detectable in salivary and prostate glands and in the duodenum. Saliva can be a rich source of EGF, especially the saliva of certain non-poisonous snakes. The use of serpents in healing rituals may reflect the value of ophidian saliva in promoting the healing of wounds. Thorough mastication of food may nourish the gut by providing it with salivary EGF. Purified EGF has been shown to heal ulceration of the small intestine [131].