Schisandra berries are very potent adaptogens that have been used for centuries to enhance stamina. By processing the berries using a CO2 extraction method, no solvents are used and the full range of chemical constituents of the berries is preserved. The concentration is extreme so most people using this oil would dilute it in fruit juice or add to a carrier to use externally to improve skin tone. As an adaptogen, schisandra is known to protect against a wide variety of stressors, such as extreme cold as well as exposure to toxins. It is particularly helpful for vision and the liver as well as coughing; but a popular use is to protect against oxidative stress, including that which leads to inflamation and mutations.