This product is magical, and I'm usually a skeptic. I even waited over a month of use before writing a review, just to allow time for negative effects to kick in. There have been none. I never ever want to go back to the frustrating and embarrassing excessively sweaty armpits I used to have every single day for decades ... especially now that I know how comfortable it is to have dry underarms and buy whatever shirts I want. Everything else I tried was a complete failure, and this worked immediately, the very first application for me. The second night application was unnecessary for my skin type. Since then I've been applying it less than weekly, also using occasional deodorant for smell. I like that I still mildly sweat when exercising or when its healthy to be sweating. I love that I no longer sweat profusely immediately after having a shower, or when I'm nervous.
I will be a lifetime customer of Drysol, no question! The price is absolutely worth it.