I heard, quite a while back, that while deodorants are basically just smelly persistent goo that helps trap and mask your most stinky zones, antiperspirants actually act by having an element that binds to your sweat glands, and this can actually cause them to block up and cause dermatological problems.

Is this still, or was it ever accurate?

I dunno, maybe its more or less like many kinds of make up, where that only becomes a problem if you don't wash it off after use?