I have found a shorter, faster and lass painful way to accomplish almost the same results. For two to four weeks stop eating the most common foods that cause irritation and allergy. The usually suspects are: soy, dairy, wheat, other gluten grains, eggs, citrus, shell fish and nuts. You can also eliminate any other foods that seem to cause you digestive upset .
Be sure to check the labels on the foods you eat very carefully. Gluten can be added to foods without any mention on the label. Look for: wheat, durum, semolina, faro, kamut, spelt, rye, barley, added vitamins, baking powder, caramel color, dextrin, hydrolyzed vegetable protein, malt, MSG, flavorings and colorings, spices, starches and vinegar. With gluten, it’s best not to trust any prepared foods except those especially marked as gluten-free.
If symptoms don’t improve during the elimination period, you may not have a dietary trigger for you allergy or the food items you eliminated may not be the culprits. If you find relief, try adding back one eliminated food every few days. If you suffer a reaction take that food back out of your diet and try another food.
This process will take about two months. By the end you will have a good idea what foods you are better off eliminating from your diet..