In this study, free radical scavenging activity, total phenolic content, total oxidant level, and total antioxidant level of methanol and acetone extracts of T. turcica, an endemic species in danger of extinction, were determined. Both extracts of T. turcica were determined to have a certain level of radical scavenging effect, proportional to their level of total phenolic content. In addition, the acetone extract was determined to have a stronger radical scavenging effect; the methanol extract was observed to have a higher total antioxidant capacity. As a result, T. turcica can be used in pharmaceutical products as a source of natural antioxidants. Therefore, we think studies on how to ensure the existence of this species, which is in danger of extinction, should be emphasised.