I'm not going to pretend to be an expert but lactose intolerance depends on gut microbes which doesn't require evolution to change. You can alleviate symptoms of lactose intolerance with probiotics/kefir.

> lactose intolerance depends on gut microbes which doesn't require evolution to change.

I was responding to a comment that expressly said we evolved to consume milk after domesticating cows.

From what I’ve read the evolution of adult lactase was almost instant. Humans naturally produce lactase as babies, but what had to happen was to extend that production into adulthood. This is really a straightforward mutation then, what had changed was the non silencing of the gene that is already active at birth.