Table 5. Effects of clear skin powder on cell viability, pro-collagen typeⅠC peptide production and MMP-1 secretion of HS68 cell and HaCaT cell

Clear skin powder (μg/mL)	HaCaT cell		Hs68 cell
	Cell viability (%)	MMP-1 (ng/mL)	Cell viability (%)	pro-collagen type I C (ng/mL)
Control	100.00±3.25	0.54±0.05	100.00±6.94	559.84±28.26
62.5	101.16±3.09	1.02±0.04	111.32±2.51	619.62±50.49
125	110.45±2.36**	0.92±0.15	113.44±3.32	569.14±36.85
250	114.52±6.88**	1.17±0.06	112.78±1.80	502.91±61.72
500	106.78±4.01	1.15±0.02	104.82±0.67	562.94±40.91
EGCG	124.28±3.59***	0.07±0.03***	124.38±3.25***	695.14±42.09**

p<0.05,
p<0.01,
p<0.001.
EGCG, Eepigallocathechingallate was used as positive control.