Consuming large quantities of milk and other dairy products can cause constipation in adults, according to Cleveland Clinic. The high-fat and low-fiber content of dairy products causes the binding effect, explains Everyday Health.
The most common cause of constipation is insufficient fiber in the diet, states Cleveland Clinic. Dehydration, certain medications, stress and failing to empty the bowel when the need arises are other causes of constipation. Medical conditions, such as hypothyroidism, diabetes, IBS, multiple sclerosis and pregnancy, can also cause constipation. Consuming a well-balanced diet that includes plenty of fiber, drinking eight glasses of water per day, engaging in regular exercise and moving the bowels when the urge arises are ways to prevent constipation.