Fig. 5.

(A) Collagenase and (B) elastase inhibitory activities of formulation containing 5% tannase-converted green tea extract. Collagenase inhibition activity (%) = [(A–B)/A] × 100. (A) With collagenase but without sample; (B) with sample and collagenase. The percentage of elastase inhibition was calculated using the same method used for collagenase inhibition. Bars are means ± standard deviation of three determinations. Asterisks indicate significant differences (p < 0.05) among samples by Turkey multiple range test. FNGE, formulation containing 5% normal green tea extract; FTGE, formulation containing 5% tannase-converted green tea extract.