When last week I ran out of deodorant, my girlfriend pointed me out that there are a lot of harmful propellants in a can.
She did some research and found a store nearby that sold a different kind of deodorant. The thing we bought basically was a small can with a sprayer on and crystals in it. The package learned us the crystals were alum crystals (info on the product can be found here (dutch!)).
A short research learned me that alum is the product that stops you from sweating. When mixed with water, alum crystals dissolve and the result will act the same as deodorant but without the scent (there’s always perfume to solve that).
I was stunned that a product that low-tech could solve my impact with deodorant. I did some further research on alum crystals. When I was a kid I tried growing salt crystals once. You had to wait a long time before you could see something and the final result wasn’t really impressing. When I looked up if it was possible to grow these alum crystals, I found a step by step tutorial on this site.
So now I don’t only own a non-toxic deodorant, if it’s empty I know how to grow my own!