Odex is not like chlorophyll - it doesn't just mask odors. The way it works is by cleansing out your kidneys so they are better able to filter waste in your blood. I think it also neutralizes certain toxins in the blood as well. It also improves digestion, which is always good when it comes to BO. If you have fecal BO, I would do a fiber-based Colon Cleanse first, like with psyllium or something like that. If it's just regular BO, try Liver Cleansing stuff. I'm taking Vit-Immune and Maximum Milk Thistle - one or both seem to be helping.