13 brightener is as follows:
The first category, whitening agents that inhibit the formation of melanin.
Arbutin (limit: 7%), kojic acid (limit: 2%), dipropyl biphenyl glycol (limit: 0.5%), cetyl tranexamate (limit: 3%), tranexamic acid (limit: 2%-3%), potassium methoxysalicylate (limit:1.
The second category: it can inhibit the formation of melanin and promote the desalination of melanin.
3-O- ethyl ascorbate ether (limit 1.0~2.0%), tetraisopalmitate ascorbate (also known as tetrahexyldecyl ascorbate) (limit 3%), magnesium ascorbate phosphate (limit 3%), sodium ascorbate phosphate (limit 3%) and ascorbate glucoside (limit 2%).
Among them, tetraisopalmitate ascorbate (tetrahexyldecanol ascorbate) is the only whitening agent that has also been approved as "pharmaceutical cosmetics".