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What are you trying to say? How does this contradict anything I just said?

Lactose intolerance is an issue involving lack of endogenous proteins, not the gut biome.

Asians, all humans, except for rare cases can digest lactose in infancy.

IBS is a functional gut pain/dysfunction syndrome. Those with lactose intolerance don't get IBS when they eat cheese.

Children create lactase to process milk (lactose) until around puberty, then they stop creating it. I learned in college that studies have shown that a lot of people of Northern European descent continue to create lactase into adulthood, and thus can continue to break down milk and cheeses without issue.

There is still a percentage of non-European population that can consume lactose into adulthood, and not break it down without any external symptoms.

There are plenty of non-Europeans that can digest lactose. Think middle-easterners and Mediterraneans and their consumption of sheep and goat milk. Central and East africans too. The trait has incomplete (variable) penetrance.

Lactose tolerance is estimated at 30-45 percent.. So it's a substantial non-European population. The intolerance is heavily skewed toward East and South Asia -- though a lot of South Asians consume milk and paneer.

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