I use magnesium hydroxide, usually sold as a laxative. It is nearly the same thing as the active ingredient in most deodorants, except it isn't an antiperspiran

I use magnesium hydroxide, usually sold as a laxative. It is nearly the same thing as the active ingredient in most deodorants, except it isn't an antiperspirant nor is scented nor has a creamy consistency, etc. It's also really cheap, and you can buy by the liter.