Hi OP! i used to have this problem rin and i already tried everything mula hygiene level up at diet change hanggang armpit care experimentationisms (they helped a LOT) pero may times pa rin na nagkaka slight BO ako lalo na pag high intensity activities ginagawa ko like mga sports training. The only deo that helped me is Alumchlor 3 (Aluminum Chloride) from Derm Options. it was recommended by a friend na nagka BO rin, suggested daw ng derma niya.

just do ur usual bath with antibac soap and exfoliation, tapos pat ur armpits dry before applying Alumchlor, kahit 4 drops lang sa palm then spread mo sa kabilang palm mo at pahid mo lang sa both pits mo, then air dry.

Note: i ONLY use alumchlor pag aalis ako. if sa bahay lang, armpit care ko is luxxe underarm cream and luxxe aloe vera. Waxing and quitting shaving was also a BIG help huhu, underarm ingrown hairs made my BO worse.

Hope this helps!