Abstract
Citrus × clementina juice obtained from fruits collected in three different areas (flood plain, hill and coastal plain) was investigated for the chemical composition, radical scavenging properties (DPPH and ABTS tests), and α-amylase and α-glucosidase inhibitory activity. Neohesperidin (72.96–116.50 mg/100 mL), hesperidin (55.24–69.52 mg/100 mL) and narirutin (7.21–12.13 mg/100 mL) are the main flavonoids identified by HPLC analyses. In carbohydrate hydrolysing enzymes inhibitory activity tests, samples showed higher potency against α-glucosidase. Juice from hill was the most active with an IC50 value of 77.79 μg/mL. Data on the radical scavenging activity revealed the following trend of potency flood plain > coastal plain > hill. These results could help farmers to select fruits for different industrial purpose such as functional food and matrix to extract nutraceutical products.
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