摘要:This research is aimed at finding out the antioxidant contents in instant drinking powder of mangosteen ( Garcinia mangostana L) peel and finding out its preference level as antioxidant source. The method used in this research consisted of five steps, namely 1) making instant drinking powder of mangosteen peel ( Garcinia mangostana L) , 2) antioxidant content testing, 3) water content testing, 4) sugar content testing, 5) organoleptic testing. The result of the research on the antioxidant content of sample instant mangosteen peel drinking powder repeated twice with the average of 80 g of peel mass was 27.8350%, with the average 100 g of peel mass is 29.1237%, and with 120 g of peel mass was 31.7859%. Based on the result of organoleptic testing, most of the respondents preferred the sample with 120 g of the peel in terms of the taste, color, texture, and aroma. Keyword: mangosteen peel, antioxidant, drinking powder