Table 5
Inhibition activity of extracts from Aster scaber on tyrosinase

Sample	Tyrosinase inhibition activity (%)
	Phenolic content (μg/mL)
	50	100	150	200
Water extracts	15.78±0.57^a1)	15.62±0.47^a	24.49±0.27^b	46.86±2.83^c
Ethanol extracts	13.77±1.62^a	14.88±3.59^a	22.85±0.60^b	24.70±1.35^b
Kojic acid	35.21±2.09^a	55.43±1.72^b	67.92±1.32^c	77.03±1.51^d

Mean±SD (n=6), means with different superscript letters within level are significantly different at p<0.05 by Duncan's multiple range tests. Kojic acid was used for control.