Comparative analyses on radical scavenging and cytotoxic activity of phenolic and flavonoid content from selected medicinal plants.

This study aimed to compare the total phenolic (TPC), flavonoid (TFC), radical scavenging and cytotoxic activities in the aqueous methanolic extracts of , , , and with two dietary plants: and . The TPC and TFC in medicinal plant extracts were 12-93% lower than as follows: > > . > > The decreasing radical scavenging activity in medicinal plant extracts shared similar trend: > > . > > Both TPC and TFC were positively correlated with radical scavenging and cytotoxic activities. All medicinal plants were considered inactive (LC > 0.2 mg/ml) and safe for consumption. The TPC, TFC, radical scavenging and cytotoxic activities in the medicinal plants were plant-part dependant, in particular and .