Breathing gives us life. It helps us take in oxygen that our cells need and get rid of toxins they don’t, like carbon dioxide. Mouth breathing doesn’t allow our body to deliver oxygen the way it was designed. In fact, it’s dangerous. You’re probably saying to yourself, “Why is mouth breathing bad? It’s no big deal.” Surprisingly, mouth breathing has been shown to worsen congestion, lower our immune function, and deteriorate our oral health. It even keeps you up at night by causing snoring and, in some cases, sleep apnea. Nasal breathing, on the other hand, helps to decrease congestion, give a boost to the immune system, and protect the teeth from decay. That’s why we’ve gathered all the details breaking down each danger associated with mouth breathing, as well as all the positives linked to nasal breathing.