I second this. I had debilitating underarm sweat and continually ruined shirts with pit stains. I switched from antiperspirant to a simple deodorant. I sweat SO much less in the arm pit area and I never sweat through my shirts anymore (unless I'm working out, of course).

Undershirts have been a good win as well - keeps the chemicals off my real shirt, and if you get high-end ones, they're light and breathable and don't make me any warmer.

I can't believe antiperspirant continues to exist as a product. Must be working for somebody.

This is like a secret that unbelievably hasn’t hit the mainstream. If you sweat heavily pretty much no antiperspirant will work as advertised. Some of the prescription brands have you applying the night before and I had some success but they tended to tear up my armpits and ultimately fail. Personally I see a direct correlation between alcohol consumption and sweating. I discovered that as an unintended consequence during a 30 day detox. If I limit my alcohol intake and use just a deodorant I find myself much better off. Worth experimenting with if you’ve tried everything else.

At least from my attempts / for me: antiperspirant is dramatically more effective, for far longer, at preventing body odor. Like 4 hours (or less) vs 24+ hours better.