Table 4.
Total polyphenol contents, ABTS, DPPH radical scavenging activity in water extract and 70% EtOH extract from P. tenuifolia

	Water extract	70% EtOH extract
Total polyphenol contents (mg/g)	26.50 0.52	17.84 2.32
ABTs RC50 (mg/mL)1)	0.95	2.47
DPPH RC50 (mg/mL)	3.29	4.43

Values are means SD (n=3).
RC₅₀ : Concentration required for 50% reduction