Giardia LifeCycle(French version) (Photo credit: Wikipedia ) According to the WebMD a bowel transit time test measures how long it takes for food to travel through the digestive tract. People generally don't consult a doctor immediately for changed bowel movements. The fruits and vegetables in the diet decrease bowel transit time, increase fecal weight, number of defecations, fecal excretions and apparent digestibilities of energy, nitrogen, and fat. The low fiber diet increases higher diastolic blood pressure of 80 or even more. On the contrary, the high fiber diet lowers the diastolic blood pressures. Funny Keep Bathroom Clean Sign (Photo credits: www.justbathroomsigns.com ) Constipation is caused by a lifestyle factor rather than an underlying health problem when the body's normal rhythm is disrupted and the movement of stool through the colon slows down. More water is absorbed from the stool than would normally occur, and as a result, stools become drier and hard