Title: Can You Become Lactose Intolerant After Eating a Vegan Diet?
Headings: What is Lactose Intolerance? Can You Become Lactose Intolerant after Eating a Plant-Based (Vegan) Diet?
What is Lactose Intolerance? Can You Become Lactose Intolerant after Eating a Plant-Based (Vegan) Diet?
60% or more of humans are lactose intolerant.
Lindsay S. Nixon

Content: Being able to digest milk is so strange that scientists say we shouldn't really call lactose intolerance an allergy or a disease, because it presumes that the intolerance is abnormal. Instead, they call it lactase persistence, indicating what's really weird is the ability to continue to drink milk. Think of it another way: By consuming dairy you're not only breast-feeding well past infancy (not normal), you're also breast-feeding on another species (not normal either!). Is it really surprising that most people are then "intolerant"? Those with lactase persistence have a genetic mutation either from European or African ancestors. Small populations of African peoples were historically cattle herders, and that's where their lactase persistence genes come from. The European mutation appeared approximately 7,500 years ago in dairy farmers who lived in the Funnel Beaker region. Today, the highest proportion of people with lactase persistence live in Northwest Europe, especially the Netherlands, Ireland and Scandinavia, though research suggests that dairy farmers carrying this gene variant probably originated in central Europe. ( Source)
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