Out of interest - what were the symptoms of your lactose intolerance?
When I was discussing my gut issues with my 2nd gastroenterologist, he told me I could test myself for lactose interance. For 2 weeks, I avoided dairy 100% - that meant reading every label carefully but I was successful - and felt great. Then, on his instructions, I ate a pint of my favorite ice cream (Ben & Jerry's Phish Phood). Within minutes, I was bloated and passing gas, lots of stinky gas. Shortly therafter, I had gut-emptying diarrhea.
Sorry to be graphic, but it's such a relief not to face that anymore.