Fermented dairy products, especially real Yoghurt, are often tolerated better by lactose malabsorbers than unfermented dairy products. The intake of dietary supplements containing acid Lactase derived from Aspergillus oryzae with lactose containing foodstuffs is known to reduce/alleviate symptoms of lactose intolerance in lactose malabsorbers. The study aims to compare the effect of the intake of a combination of yoghurt bacteria and acid lactase to the effect of yogurt bacteria or acid lactase alone on the lactose digestion in lactose malabsorbers. It is hypothized that the combination preparation will be more effective and/or will show a more reliable effect than the two mono-preparations.

Inclusion Criteria:

• Subjects of African or Asian origin.
• Older than 18 years
• Written informed consent

Exclusion Criteria:

• Participation in a clinical study with a drug or a medical product withing the last 30 days;
• Inability to comply with the study protocol;
• Allergy to milk protein;
• Intolerance against lactase preparations;
• Known metabolic or gastrointestinal diseases which affect the absorption, metabolism or excretion of food components except lactose maldigestion;
• Intake of drugs influencing resorption of food components or gastrointestinal motility;
• Surgery within the last three months which still affect the current status of health;
• Psychiatric diseases
• Epilepsia
• Risk for suicide
• Eating disorders, e.g. anorexia, bulimia
• Alcohol or drug abuse
• Legal incapacity