Interesting article.

I am pescetarian (fish). I haven't really used deodorant in years, other the crystal that has been mentioned. But that has usually been in the summer only.

I found one of the best things that I did to reduce odour, was to stop wearing tech fabrics and switch to wool. I know that it's difficult to wear wool in the summer, but it helped dramatically. If I would still wear tech jerseys, I made sure that I added borax to my laundry detergent when washing. That helped reduce the stench that seems to linger in these types of fabrics.

Hope this helps.