The main reason why Wright Weijian whitening pill may improve the black and yellow skin is that it contains some ingredients that can inhibit melanin production.

For example, vitamin C, vitamin E and other ingredients can inhibit the synthesis of melanin from the source and dilute the skin color.

In addition, whitening pill may contain some other whitening ingredients, such as arbutin and its derivatives, kojic acid and its derivatives, phenylethyl resorcinol (377) and licorice extract. These components can also achieve whitening effect by inhibiting the activity of tyrosinase.

However, although whitening pill may have a certain effect on improving black and yellow skin, we should also pay attention to its possible side effects, such as yellow urine and heavy kidney burden.

Therefore, when using whitening pill, we should pay attention to its dosage and possible side effects, and follow the doctor's advice.