Antielastase Activity of Macassar Kernels (Rhus javanica) Stem Extract and Skin Elasticity Evaluation of Its Topical Gel Formulation

Table 5

Antielastase activity and IC₅₀ value of stem extract.

Sample (μg/mL)	Elastase inhibition (%)	Coefficient of variation	The regression equation and correlation value	IC50 (μg/mL)
100	25,40 ± 0,18	0,72	Y = 0,4408x + 24,668 R = 0,9989	245,68
150	33,76 ± 2,67	7,91
200	41,33 ± 1,83	4,43
250	51,56 ± 2,84	5,51
300	59,04 ± 2,39	4,64