Dear Sister’s own R & D Center has acquired the unique patent ingredients.

Dear Sister is conducting continuous research for healthy skin

and excellent quality through its own cosmetic research institute.

We are focusing on safe materials and new developments with

safe and up-to-date formulas and many years of experiments.

We strive to produce safe and healthy products in a strictly controlled

environment for superior quality. As part of our efforts, we are carrying out

certifications such as ISO 22716 (International Cosmetic Standard),

ISO 9001 (Quality Management), ISO 14001 (Environmental Management),

and manage them more thoroughly.