Bioactive content and antioxidant capacity of Cape gooseberry fruit
At present, Cape gooseberry (Physalis peruviana) fruit is one of the less used raw materials of plant origin, which can be used for human nutrition. This fruit, as well as alimentary products made of it, were used by healers in folk medicine in the distant past. The aim of this study was to monitor and evaluate the antioxidant capacity of fresh fruit of three Cape gooseberry cultivars ‘Giant’, ‘Golden berry’ and ‘Inka’. Antioxidant capacity was also tested, on the basis of the scavenging effect of reactive oxygen species (ROS) and lipid peroxidation of methanolic extracts made of fresh fruit. These results were further extended and supplemented with determinates of the vitamin C and total phenolic contents. These analyses were made for three consecutive years. The highest values of antioxidant capacity were observed in the ‘Inka’ cultivar (9.31 grams of ascorbic acid equivalents kg−1 of fresh mass). In this cultivar, the obtained results were corroborated also in ROS and the contents of vitamin C and total phenolics. Due to a high antioxidant capacity of this fruit species, the results presented should increase its popularity above all as a promising raw material, which can be used for human nutrition.
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