Lactose intolerance - along with fructose and sorbitol intolerance - is one of the so-called carbohydrate intolerances. In Germany, around 15 % of the population is affected, worldwide even significantly more. This intolerance can have a significant impact on quality of life, as it restricts the enjoyment of many foods and manifests itself in numerous, often unspecific symptoms. In this article, you will find out what exactly is behind lactose intolerance, how it develops, how it is diagnosed and what treatment options are available - both from a conventional medical and holistic perspective.