People with any chronic inflammatory condition should avoid eating grains, according to Dr. Joseph Mercola. This is true for celiac disease, heart disease, or any type of autoimmune disorder. Grains and sugars are pro-inflammatory. Fortunately probiotics are anti-inflammatory.
Probiotic bacteria digest and absorb some carbohydrates for us. They produce vitamins, absorb minerals and remove toxins. Probiotic bacteria control bad bacteria. They prevent allergies. Probiotics support your immune system.
"This means that altering intestinal microbiota could improve the quality of life for celiac patients, and also patients with diseases such as type 1 diabetes and other autoimmune disorders."
Grains break down to sugar. Sugar causes insulin to rise. This has a negative effect on weight, cholesterol, blood pressure, and increases the risk of type 2 diabetes and cancer.
If you're trying to avoid eating grains, be aware that it's hidden in some processed foods. Read the labels on processed foods, and be on the lookout for names like malts, starches, hydrolyzed vegetable protien (HVP), texturized vegetable protein (TVP), and natural flavoring.
http://articles.mercola.com/sites/articles/archive/2010/05/27/gut-bacteria-offer-new-hope-for-people-with-celiac-disease.aspx