I am a 62 year old woman in very good physical condition. I had my last colonoscopy November 3, 2009. I have had two previous colonoscopies. This last colonoscopy resulted in the doctor removing one polyp. Haven't heard the results of that biopsy. I did get a letter from the doctor that stated "The biopsies of the colon showed melanosis coli. This is a staining of the colon from chronic laxative use. Please stop all nature and chemical laxative and bowel cleansing agents." My question is since I have NEVER taken laxatives, etc., except for the 3 preps, how can I change my diet to reverse the staining of the colon? I am a vegetarian, is that a factor?