Extracts from Citrus limon exhibit powerful antioxidant properties, expressed by its capacity to scavenge DPPH radicals and to reduce power, and the extracts reduce H2O2-induced DNA via its antioxidant activities. These antioxidant activities and inhibitory effects of the extracts on DNA and cell damage may further prove that Citrus limon is useful as a medicinal plant for cancer chemoprevention.

The results obtained show that Citrus limon extracts contain high enough levels of phenolic and flavonoid compounds. This is correlated with a remarkable antioxidant activity towards the reduction of iron, and a relatively high power against scavenging free radicals.