Eat more fruits and vegetables containing VC, such as citrus fruits, tomatoes, green peppers, hawthorn, fresh dates, kiwis and fresh green leafy vegetables. Because vitamin C is an oxidant, it can inhibit the oxidation of dopaquinone in the skin, transform the dark oxidized pigment in the skin into a reductive light pigment, and inhibit the formation of melanin. So eating foods rich in vitamin C will make hypopigmentation.

Seeking adoption is a satisfactory answer.