ABSTRACT: Strawberry tree (Arbutus unedo L.) is a species that generally grows in the Mediterranean region and coasts
and has been consumed as food since ancient times. Its fruits are mostly used in alcoholic beverages and various jams
and desserts. Its fruits and leaves contain different phenolic compounds, because of this it is used in traditional folk
medicine. They have different biological properties like, anti-diabetic, anti-inflammatory, urinary antiseptic, antihypertension, astringent, anti-diarrheal due to their high quantity of tannins. In this study, we aimed that to determine
the total antioxidant capacity of fruits and leaves and trace element contents of Arbutus unedo L. which were collected
in Yalova (TURKEY). The antioxidant activities of samples were examined by ferric reducing/antioxidant power
(FRAP) method, cupric reducing antioxidant capacity (CUPRAC) method and trolox equivalent antioxidant capacity
(TEAC) assay with ABTS radical cation. In the samples of the amount of total phenolic and tannins contents were
determined using the Folin-Ciocalteu reagent (FCR) method. In adddition to, we determined the concentrations of Al,
Cd, Cu, Cr, Fe, Mn, Pb, Zn in the samples by using ICP-MS. As a result, Arbutus unedo L. is a good source of antioxidants
and minerals, it was stated that single antioxidant activity test would present limited information about the power of
the antioxidant capacity and it was emphasized that use of combination of various methods should be used in assessing
the antioxidant activities in vitro. It has been determined that the trace elements are within the determined limits.
KEYWORDS: Strawberry tree (Arbutus Unedo L.); CUPRAC; ABTS/TEAC; FRAP; Folin-Ciocalteu; trace elements.