Follow a detox program that includes a colon cleanse because those toxins need to be released from the body. It’s been theorized that one contributor to bad breath is a backed up colon. When you are able to clear it out and get your digestive system functioning well again, you may find that your breath improves. Be aware that your breath may actually worsen during the detoxing process, but when it’s finished it will be better. This is natural, and occurs as toxins are released from the body.