How many people can actually digest milk? Understanding Lactase Persistence
                                
                                
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                                    4 min read                                
                            
                                Worldwide, an estimated 65–70% of the adult population has a reduced ability to digest lactose, the sugar found in milk. The surprising reality is that being able to digest milk as an adult is not the biological norm for most humans but is instead a genetic mutation known as lactase persistence.