There is a growing interest in oxygen-containing free radicals in biological systems and their implied roles as causative agents in the aetiology of a variety of chronic disorders. The present investigation is a preliminary in ongoing research on plants used in Turkish traditional medicine for their antioxidant activity. These plants mentioned in Table are used for haemorrhoids, abdominal pains and wound healing in traditional Turkish medicine [1,2]. The radical scavenging activities of the methanolic extracts prepared from the aerial parts of these plant species growing in Turkey were evaluated against reactive oxygen species such as superoxide anion (O2·-) and hydrogen peroxide (H2O2) in a non-cellular system as well as versus DPPH radical. Another goal in this study was to test whether methanolic extracts inhibited Cu+2-induced low-density lipoprotein peroxidation. These extracts exhibited dose-dependent inhibition on DPPH radical, as well as Cu+2-induced LDL peroxidation, and the results indicated that all extracts were effective on non-cellular antioxidant systems of O2·- when compared with the H2O2 group. The results are given in Table.