The soap that is best for underarm odor is Dial Antibacterial Gold Bar.
I have been using Dial Antibacterial Gold Bar soap for a few years now and it has really stopped my underarm odor.
I used to use other soaps and they did get rid of some of the underarm odor but not fully.
After I started using Dial Antibacterial Gold Bar soap my underarm odor has went away and it is also good for cleaning the whole body.
Dial Antibacterial Gold Bar soap is good budget friendly classic choice of soap that deep cleans your skin and kills 99.9 % of odor causing bacteria on contact, including for your underarms.
Other good soaps for underarm odor are Lume acidified Body wash and Megababe Space Bar soap.
Lume Acidified Body Wash is a specialized body wash that is designed to lower your skin pH and also control odors for 24 hours without disrupting your skin barrier.
And Megababe Space Bar soap is a targeted underarm bar soap that is powered by activated charcoal, tea tree oil as well as glycolic acid that absorbs impurities and gently exfoliates the skin.
To use these soaps effectively on your body and to get rid of underarm odor, lather and wait and let the soap sit on your underarms for 30 seconds to 60 seconds so that the active ingredients in the soap can break down the bacteria.
And scrub gently, using a clean washcloth or loofah to remove any trapped sweat, dead skin cells, and old deodorant residue.
And then dry your skin completely before applying any deodorant or antiperspirant.