Top 100 High ORAC Value Antioxidant Foods: The ORAC values of the following spices-herbs-foods are rated very high (healthy) and are worth considering in your diet and preps for your overall health and well-being. ORAC=Oxygen Radical Absorbance Capacity. In short, ORAC units measure the antioxidant capacity of foods. The higher, the better. It is widely believed that high antioxidant foods help greatly to lower the risks of cancer, degeneration, and disease.