Help me with under arm bad odor

Hello I'm a woman who suffers from bad under arm odor for along time. Ten years or more.. only odor not too much sweating..odor that starts shortly after showering.. i tried alot of things .. medications remedies nothing worked for me. I'm really frustrated..what worked for you i want you to tell me and i will try everything. Recently I got to know this forum and was amazed to find a place for people like me.. so I bought zinc and magnesium supplements people here were talking about and currently using them.. so please share with me every thing you know