Most of the world is lactose intolerant
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Meta analyses show that 68% of the world are lactose intolerant[1]
In Asia and Africa, its far higher, and in Europe, US and Canada, its around 1/3 or so.
References
Storhaug CL, Fosse SK, Fadnes LT. Country, regional, and global estimates for lactose malabsorption in adults: a systematic review and meta-analysis. The Lancet. Gastroenterology & Hepatology. 2017;2(10):738–746. ↩︎