9. As the results of this study demonstrate, antioxidant activity of different Rosa species is recommended to be analyzed more comprehensively. Furthermore, differences in the antioxidant properties among samples of the same species from different locations underline the importance of further investigations under different environmental conditions. The results also revealed that different solvents and extraction methods should also be examined as they play an important role in biological activity. The concentration of extracted bioactive ingredients greatly influences the medicinal effects of the rosehip