Unfortunately, the added aluminum is the ingredient that is the antiperspirant. I usually use powder in the summer to keep down the sweating. There are some really good baby powders that you can use. Find a powder to use after your deodorant (powder under the arms and under the breasts works quite well.)
One more thing, remind your family and friends that they need to switch to solids, as the aerosol isn't good for the ozone level.