this is from a naturopath Dr.Jordan Rubin,
perhaps this info can help you -

Sixty to 80 percent of the lymphatic system is located in your small intestine. Called the gut-associated lymphoid tissue (GALT), it is almost synonymous with the term immune system. The gigantic task of your GALT is to discriminate between nutritious and dangerous substances passing through your bowel.

Antigens in your system signal the presence of substances or organisms that could potentially threaten your health. Your GALT alerts the immune system to respond appropriately. When your GALT fails to function properly, your immune health is compromised, and dangerous toxins may escape from the colon into your bloodstream. Numerous illnesses could be released to attack virtually any tissue or organ — even your entire body. That is why lymphomas (cancer of the lymphatic system) spread so rapidly; the lymphatic system literally goes throughout the length of your body. It has been said that death begins in the colon. And so does life.
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Jordan's Tip of the Day
From the author of The Maker's Diet

GALT's Helpers
Did you know that up to two pounds of your weight consists of bacteria inside your gut? There are trillions of them, and they protect you from serious illness every single day. Maintaining the balance between the good and bad bacteria, however, is key. Choosing organic meats, pesticide-free produce, and fermented foods helps keep the balance in check and your body from getting sick.
http://www.makersdiet.com/publicsite/interstitial.aspx

what is naturopathic medicine?
http://www.answers.com/topic/naturopathic-medicine