Especially important in relieving and preventing constipation is the recommendation of increasing dietary fiber. High levels of dietary fiber increases both the frequency and quantity of bowel movements, decreases the transit time of stools, decreases the absorption of toxins from the stool, and appears to be a preventive factor in several diseases. The recommended daily intake is 25-35 grams of fiber from dietary sources. However, higher amounts may be more optimal for health as our evolutionary diet contained approximately 100 grams of daily fiber. Most Americans only get about 10-15 grams of fiber each day, hardly enough to help propel food through our digestive tract and nourish the microbiome.