3 ms·

I suspect lactose intolerance in the US is inversely correlated with wealth -- so this could just be another study showing that wealthy folks live longer.

• mac01021 7y ago
  > actose intolerance in the US is inversely correlated with wealth I'm not well informed about the causes of lactose intolerance. Is this correlation diet-induced/environmental? Or is it a congenital/racial thing where white people be rich and everyone else is genetically intolerant?
  • shafyy 7y ago
    The latter.
  • mr_toad 7y ago
    Lactose intolerance is the norm. Tolerance is unusual in adult mammals. In humans, it appears to be a very recent mutation, probably associated with the domestication of livestock. https://en.wikipedia.org/wiki/Lactase_persistence https://en.wikipedia.org/wiki/Lactase_persistence