Ginger has a distinctive aroma that is often used as a spice in cooking, and is used as a herbal medicine. The unique fragrance and flavor of ginger come from its natural oils, the most important of which is gingerol. Gingerol is the main bioactive compound in ginger. It’s responsible for much of ginger’s medicinal properties. Gingerol has powerful anti-inflammatory and antioxidant effects, according to research. Ginger is used to aid digestion, reduce nausea, help fight the flu and common cold, and boost immune system.