ABSTRACT
Excessive Reactive Oxygen Species (ROS) can cause hypertension. Prevention of the risk of
hypertension is consume an antioxidant. Noni (Morinda citrifolia L). is a plant that empirically
proven to lower blood pressure and has antioxidant activity. Antihypertensive activity of noni
leaves is influenced by phenolic and flavonoid compounds. The extraction method affects the levels
of compound in extracts. The aims of study is determine the effect of the extraction method on the
total phenolic level, total flavonoid level and antioxidant activity of noni leaf extract. The
extraction methods are maceration, Microwave Assisted Extraction and Soxhlet. The results
showed that the different extraction methods affected the total phenol level, total flavonoid level
and antioxidant activity of the noni leaf extract. The Soxlet method provides the highest total
phenolic level, total flavonoid level and antioxidant activity than other extraction methods.
Keywords: Noni leaf extract, extraction method, total phenolic level, total flavonoid level and
antioxidant activity
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