When we breathe deeply and regularly with our nose, we becomes more alert brain of oxygen. Fat also need oxygen to be burned so just win - win to breathe through the nose.
When we breath deeply, the diaphragm moves up and down and then rub while liver , stomach and intestines . This affects the digestive process positively. Even the heart gets massage and helps the blood flow to come back. Following that reduce varicose veins and obtain a stable blood pressure . Aahh what I'm going deep breathing regularly now . No more varicose veins to me thanks !
who sleeps with his mouth closed wakes also more rested and heals and recovers therefore better.
Think about this and try to take control of your breathing.