When you let the light shine through a bottle of Avena's medicinal oil you will see and feel more than just light. Our oils radiate healing. We create Avena's oils by infusing our biodynamic herbs in the finest organic olive oil for a two week period. Our extended process allows for the healing properties of the herbs to be fully extracted into the oil. As with all of our products, our infused medicinal oils are made by a completely chemically-free process. Their shelf life is one and a half years.