<![CDATA[The enzyme α-amylase is one of the enzymes that plays a role in the process of degrading starch into maltose and glucose. Organic compounds such as polyphenols and flavonoids are inhibitors of α-amylase. The star fruit plant (Averrhoa bilimbi L.) has α-amylase enzyme inhibition activity and has the potential to be used in the therapy of type 2 diabetes mellitus. This study aims to determine whether ethanol extract and the fraction of star fruit (Averrhoa bilimbi L.) have α-amylase enzyme inhibition activity, inhibition against α-amylase enzyme and better inhibition activity. The test of α-amylase enzyme inhibition activity was carried out using 3 test groups, namely negative control, positive control (acarbose) and samples (ethanol extract and star fruit fraction) with concentrations of 12.5 ppm, 25 ppm, 50 ppm, 100 ppm and 200 ppm. The results of testing the inhibitory activity of α-amylase enzyme of ethanol extract and the fraction of star fruit (Averrhoa bilimbi L.) obtained IC50 values of 5.581 μg/mL, 76.725 μg/mL, 43.152 μg/mL and 55.447 μg/mL, respectively. Based on these results, it can be concluded that the ethanol extract of star fruit (Averrhoa bilimbi L.) at a concentration of 200 ppm has a very strong activity in inhibiting the α-amylase enzyme with an inhibition percentage of 85.217% and an IC50 value of 5.581 μg/mL.]]>
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