Lactose intolerant after removing dairy?

greyt00

My sister said she learned in biology class that if you stop consuming lactose your body stops producing lactase and you might have problems if you start consuming it again.  I LOVE dairy but gave it up to BF due to food allergies.  I've been off dairy for 7.5 months so naturally this has me scared.  Has anyone ever heard of this?  Or did you go on to start consuming dairy again with no problems?  I know 3 people in real life who've removed dairy and then started eating it again and they never mentioned this problem to me.

I don't want to hear about how there is life without dairy or if I can just take supplements for the rest of my life or whatever.  I want to hear that this won't be a problem and I can just start eating it again (I plan to ramp up slowly).  Please....