Japanese concentrated mint oil is one of the most effective remedies against colds and respiratory infections; just sniff a drop on the back of your hand to open? the closed nose; put a drop for the night on a wet cloth placed on the radiator or humidifier; Japanese mint oil can be poured (2 drops in 3 fingers of water) in water, due to its digestive action.
Also useful for relieving headaches, 2 drops are massaged on the temples.