This one came in as a reader request, and proves that there's no product too mundane for discussion, debate and recommendation.  I have to admit, I haven't used that many different products in this category, and Consumer Reports haven't tested them.  I'm very satisfied with Avon's On Duty Unscented, but here's what I've learned in researching the topic.  Some people get fine results from the Crystal Stick.  This product uses non-metalic salts to make your underarms inhospitable to the bacteria growth that causes odor.  The salts may also help absorb and dry a small amout of perspriation.  Most antiperspirants, on the other hand, temporarily block sweat ducts with an alumninum salt, preventing wetness, which also prevents bacteria growth and hence, odor.  If Aluminum Chlorohydrate, the active ingredient in On Duty and most other common antiperspirants doesn't work for you, try a product with Aluminum Zirconium (like Secret Platinum) or Aluminum Chloride (like Certain Dri ).  If you're still wet, ask your doctor about more radical solutions like Botox or surgery.  As for the aluminum/cancer risk rumor that has been circulating for more than a decade, there's really no proof, and most cancer experts dismiss the likelihood.