Lactose Intolerance

Cow's milk is considered a staple in many diets due to its high nutritional value. It contains almost every nutrient that the human body needs. Milk is consumed as a beverage, poured on several foods, and added to coffee, tea, and smoothies. Furthermore, many food products are produced from cow's milk, such as ice cream, yogurt, cheese, butter, cake, desserts, and others. However, it is not a suitable option for everyone for reasons, including lactose intolerance, milk allergy, dietary restrictions, and potential health risks.
Background Studies have shown wide variation in the prevalence of lactose malabsorption across the world, but no systematic reviews or meta-analyses have recently assessed the prevalence of lactose malabsorption in different geographical areas. We aimed to present an updated systematic review and meta-analysis on the prevalence of lactose malabsorption in adults, by countries and regions, and to assess the variation between different testing methods.