As with so many other parts of IBD and IBS no two people react to an Elimination diet the same way. Some people report feeling great during the elimination period. They are full of energy, sleeping well, have a decrease in muscle or joint pain, and generally feel well. Other people report the opposite feeling tired, headachy, restless, lightheaded, or with stiff joints, or odd bowel patterns. Either path is normal as the body "detoxes" and readjusts to new eating patterns. However, if you experience any new symptoms that are severe or particularly bothersome you should call your doctor or their nurse immediately for guidance.
As I mentioned before, young children should not embark on an Elimination diet without the express consent and knowledge of their physician. An ED can be risky in young children, especially over prolonged periods of time and could impede a child's growth and/or development.
Everyone, adults and children, should consult with your doctor before starting an Elimination diet, as well as while you are on the ED.
If you would like to read more about my personal experience with the Elimination diet you can read my book, Living with IBD & IBS: A Personal Journey of Success - www.ibdandibs.com

