They can be replenished with supplementation of Lactobacillus acidophilus and Lactobacillus bifidus. The time it takes for feces to be produced depends upon the amount of fiber and water content in the food. Bulkier feces travel faster because the bowel muscles can work on the material to move it. Soft, fiberless feces becomes very difficult for the colon to move. The longer it takes to move, the more water is absorbed, making the feces compacted, hard and difficult to eliminate.
Laxatives increase the amount of liquid retained in the feces and act as a lubricant.
Laxatives are often combined with substances that stimulate peristalsis. The body can easily become dependent on laxatives, destroying normal bowel function. The American Cancer Society stresses the importance of high-fiber diets to reduce the risk of colon cancer. Raw vegetables and fruits are best and fresh vegetable juice is excellent. Frequency of bowel movement does not accurately predict congestive bowel toxicity.