Buy Immunity Boosting Juice online at best price from Phlegm-Away. Dr. Joe's Respiratory Miracle is to provide relief for mucus buildup that is thicker than normal and is effective in flushing up excess mucus in your respiratory tract. Phlegm is a type of mucus produced in the lungs and lower respiratory tract. It is most noticeable when a person is acutely sick or has a longstanding health condition.