The digestive system is filled with over 100 trillion microorganisms (gut flora), some good and some bad. People with a leaky gut have an overgrowth of the bad bacteria and are deficient in good bacteria. I have had testing done to confirm that this is the case with my body and am assuming the same is true for my son. We aren't sure how this happened with him, as he seems to have been born with his allergies, but our theory is that the megadoses of antibiotics and steroids that he was exposed to in utero and shortly after birth through breastmilk may have something to do with it. Scientists don't really know why this happens.
Bad bacteria in your gut feed off of sugar and carbohydrates. By altering the nutrition that we take into our bodies, we can stop feeding the bad bacteria so it dies off, and allow for the good bacteria to take over. Once you have the proper balance of bacteria, the gut can be healed and proper digestive/immune responses occur. This is the goal of this diet, which is outlined here:
What We Can Eat
Meat - all antibiotic and hormone-free beef, lamb, pork, poultry, and fish
Eggs - antibiotic and hormone-free
Dairy - homemade raw milk yogurt, natural cheeses - made from antibiotic and hormone-free milk
Veggies - fresh and frozen organic vegetables; home-canned vegetables; artichoke, asparagus, beets, broccoli, Brussels sprouts, cabbage, cauliflower, carrots, celery, lettuce, Lima beans, mushrooms, onions, parsley, pumpkin, spinach, string beans, turnips, cucumbers, eggplant, garlic, kale, peas, squash, tomatoes, watercress
Beans - only properly soaked; navy beans, lentils, split peas
Fruit - fresh, dried and frozen organic; avocados, apricots, bananas (ripe only), berries, cherries, coconut, dates, raisins, grapefruit, kiwi, lemons, melons, nectarines, peaches, pineapple, rhubarb, grapes, kumquats, limes, mangoes, oranges, papaya, prunes, tangerines; apples and pears only from farmers who you know have not sprayed with antibiotics
Nuts - only properly soaked; almonds, pecans, Brazil nuts, hazel nuts, walnuts, cashews, boiled chestnuts; nut flour
Juice - organic and watered-down tomato juice, orange juice, pineapple juice, grapefruit juice, grape juice, apple cider
Weak tea
Honey
Oils - olive oil and coconut oil
Others - mustard, unflavored gelatin, vinegar, spices, baking soda, unsweetened chocolate
Alcohol - dry wine, gin, Scotch, bourbon, and vodka
What We Can't Eat
Meat - processed meat (bacon, hot dogs, lunch meat, etc.), smoked meat, canned meat
Dairy - processed cheese, cottage cheese, cream, feta, mozzarella, primost, gjetost, ricotta, store-bought yogurt, buttermilk, sour cream
Veggies - commercially canned; corn, white and sweet potatoes, yams, parsnips, okra, sea weed
Beans - chick peas (no hummus), bean sprouts, soybeans, mung beans, fava beans, garbanzo beans; no bean or lentil flour Grains - all, including oats and rice
Fruit - canned, dried with sulfites, banana chips
Nuts - peanuts or salted nuts of any kind
Seeds - none are allowed
Juice - canned tomato products, apple juice, juice boxes
Oils - margarine, soybean oil, canola oil, corn oil, vegetable oil
Other - cornstarch, arrowroot starch, tapioca starch, sago starch, carob, agar-agar, carrageenan, pectin, baking powder Sweeteners - sugar, molasses, corn syrup, maple syrup, artificial sweeteners, sucrose, lactose
Alcohol - beer, sherry, cordials, brandy