Has anyone been lactose intolerant BEFORE surgery, but not after?

I was lactose intolerant for years... until my gastric-bypass surgery! Now, I have NO problems with any dairy products. Has this happened to anyone? Lactose intolerant friends of mine say this is impossible -- but I swear, I used to get violently ill after dairy and now, post-surgery, I can eat cheese, milk, etc.. with no problem!

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