If you're so inclined, you could also explore "natural" anti-perspirants. There are some decent commercial products out there, I believe, and not at quite the markup as for organic foods and stuff (check out Tom's of Maine...I think they make pit stick).
I have an article that is on this same topic:http://karmagirl.joeuser.com/articleComments.asp?AID=62705
I never thought that it was cancer that was linked to antiperspirant. I thought that it was Alzheimer's linked to aluminum (which almost all non-"natural" antiperspirants have in them).
No, it's the main ingredient in antiperspirant. Here's a link that explains it: http://www.dermadoctor.com/pages/newsletter253.asp