I recently been on the candida diet. I've noticed that my BO is much better when I'm not cheating and following the diet.
The white cover on my tongue started to disappear and the brown stains under my eyes almost vanished, and of course the smell was barely noticeable.
When I wasn't strict 100% with the diet, my tongue became white again, the brown marks under my eyes got darker and bigger and the smell returned.
It took me about 2-3 month to see any improvement, and I'm still fighting it.
The diet by itself didn't helped me, I started to smell better only when I moved to the second step - elimination.
I'm currently still on the diet, and I'll keep you post if and when I'm fully recovered. I'm 99.9% persuaded that candidasis is the root for my problem.
I thing you should all test for candidiasis, It might just be the main reason for your BO as well!