Lactose Intolerance occurs when a person doesn't have adequate lactase (enzyme) in their intestional tract, thus making it impossible for them to digest the lactose (sugar) occuring in milk and milk products. This can cause painful abdominal cramping and copious gas when the lactose passes into the colon where it ferments. Health Issues-Lactose Intolerance webring members share information on coping with this common problem. The incident of lactose intolerance ranges from as few as 5% of the adult population in northern Europe to 90% of the African adult population. These websites will educate you on this intolerance and ways to overcome the problems it causes.