Breath issue could be coming from the gut, as in dysbiosis. You could try to encourage a better environment in the gut with probiotics and fiber, charcoal is a potent detoxifier particularly in the gut.
May have some liver congestion issues, could try a liver herbal cleanse.
Could increase antioxidants, could try some herbal blood cleansers like a Red Clover Combination (red clover, burdock etc).