Lactose Intolerance Things you should know How common is it? Lactose intolerance affects roughly 65% of adults worldwide! It is very common. It is extremely rare in children under 5 years old. Many people think that they have significant gut issues when it is simply an enzyme deficiency. What is lactose? Lactose is a form of sugar that occurs naturally in dairy products. It is digested by the enzyme lactase. Lactase is available as a supplement to aid in digestion of foods containing lactose. All dairy products contain varying amounts…