Ok here is the bad and the ugly. I wish there was good. I used to use antiperspirant with an aluminum compound. I than got these weird tender swelling on my armpits. I decided to stop using my antiperspirant and switch to a non aluminum based deodorant. I knew the aluminum compounds had a way of stopping your sweat glands from sweating. I thought I would try this before going to the doctor. The deodorant without aluminum worked the swellings went away. Back when this happens some 20 years ago aluminum free deodorant wasn't easy to find. Every deodorant at the grocery store or wherever had aluminum. I had to go to Wholefoods to find Tom's of Maine deodorant. That one was aluminum free. Now I can find aluminum free deodorant at any store.It's NOT aluminum! Not even a little close so if you don't know, learn what Potassium alum is. I use it daily and this article from a touchy feely 'green' site seems to explain it well:
Alum Bloc
I avoid aluminum compounds for any skin care except if I nick myself