10 Effects of Omija Tea and Precautions 1. Overview Omija tea is a traditional Korean drink made from the fruits of the Schisandra chinensis plant. It has a sweet and sour taste and is rich in nutrients such as vitamins C and E, antioxidants and lignans. Omi tea has been used in traditional Korean medicine for centuries to promote overall health and well-being. 2. Effect Omija tea has been shown..