Lactose intolerance is the inability to metabolize lactose, a sugar found in milk and other dairy products, because the required enzyme lactase is absent in the intestinal system or its availability is lowered. Some people also mention pasteurized dairy products as a cause (raw milk contains small amounts of lactase). It is estimated that 75% of adults show some decrease in lactase activity during adulthood worldwide. The frequency of decreased lactase activity ranges from nearly 5% in northern Europe read more [...]

Muscular dystrophy refers to a group of genetic, hereditary muscle diseases that cause progressive muscle weakness.[1][2] Muscular dystrophies are characterized by progressive skeletal muscle weakness, defects in muscle proteins, and the death of muscle cells and tissue.[3] Nine diseases including Duchenne, Becker, limb girdle, congenital, facioscapulohumeral, myotonic, oculopharyngeal, distal, and Emery-Dreifuss are always classified as muscular dystrophy[4] but there are more than 100 diseases read more [...]

Constipation, costiveness, or irregularity, is a condition of the digestive system in which a person (or animal) experiences hard feces that are difficult to expel. This usually happens because the colon absorbs too much water from the food. If the food moves through the gastro-intestinal tract too slowly, the colon may absorb too much water, resulting in feces that are dry and hard. Defecation may be extremely painful, and in severe cases (fecal impaction) lead to symptoms of bowel obstruction. read more [...]

In medicine, diarrhea, also spelled diarrhoea (see spelling differences), is frequent loose or liquid bowel movements. Although for many people diarrhea is merely unpleasant, diarrhea that is both acute and severe is a common cause of death in developing countries and the second most common cause of infant deaths worldwide. It is often due to gastroenteritis. Causes of Diarrhea Diagram of the human gastrointestinal tract. Diarrhea is most commonly caused by viral infections, read more [...]