Based on the penetration principle, according to the query of Ginseng Shanzhai Health Network.

1. Ice crystals can effectively enter the dermis by the principle of permeation.

2. Then it can decompose and dissolve melanin, and promote the crushed melanin particles to be excreted with the metabolism of the human body, thus achieving the effect of freckle removal. The above is the principle of expelling black ice crystals.