This article states that 68% is the global prevalence estimate of lactose malabsorption. "Lactose malabsorption (lactase non-persistence) is not equivalent or

This article states that 68% is the global prevalence estimate of lactose malabsorption. "Lactose malabsorption (lactase non-persistence) is not equivalent or synonymous to lactose intolerance. Lactose malabsorption in many cases will not come to clinical attention."[1] [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4040760/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4040760/