It is the most primitive and direct formula basis for cosmetics manufacturing to find out the substances lacking in the skin of different age groups and the factors of skin aging.
Dermatologists are the main ones. Academic cross-teams are organized to compare standard skin and problematic skin and find out the differences. This is the original basis of effective cosmetics formula.
Before cosmetics marketing, 300-1000 volunteers without skin type were selected for clinical allergy test for 3 months to 2 years, and the prescription was adjusted to the best according to the test results.
