YOSHIDA follows the principle of medicine, specializes in the root cause of skin aging, and establishes the logic of "muscle medicine" (skin medicine) with the rigorous and verified process of medical pharmacology, which solves the root cause of skin aging and decline from the bottom of skin, eliminates the Glycation and oxidation of skin caused by AGEs and free radicals, comprehensively resists Glycation, deeply reverses Glycation, and resists aging in multiple dimensions, and restores the peak youthful state of skin youth.