Oregano essential oil is an excellent antiseptic. Some of its benefits: -It is especially useful for underweight people as it increases appetite. -It helps the digestive system as it soothes the stomach, the spleen and the liver. -It can be helpful to regulate stomach acidity by reducing the stomach juices as well as by reducing flatulence. -It is suitable to calm intestinal spasms. -It is especially useful in bronchitis and asthma as it helps reduce the symptoms. -It has expectorant properties and helps fight the cold. -It helps strengthen the immune system and treat fungal infections.