Figure 4

Alteration of percutaneous penetration for CAR mixed with BT, HQ or HSC. The penetration amount of 4 wt% CAR with and without same molar ratio of counter ions, BT, PQ or HSC into SC layers are represented as percentage of applied samples (a) and decrease or Increase in CAR penetration are represented as change ratio (b). Data are means and bars represent the standard error of them. *p < 0.05; Student’s t-test.