Online, even some dermatologists will caution vitiligo patients to not eat vitamin C, and even not to eat foods rich in vitamin C. In fact, this is wrong. Vitamin C has a certain whitening effect and is sometimes used in whitening cosmetics. It is used in dermatology clinics to assist in the treatment of pigmented skin diseases such as chloasma. So there are dermatologists based on this that vitamin C may aggravate vitiligo. This is not enough understanding of the pathogenesis of vitiligo, vitiligo is due to the disappearance of melanocytes in the skin lesions, the disappearance of the cause may be the own immune system enemy, the melanocytes as the enemy attack, kill the melanocytes, so this and vitamin C is not related at all, vitamin C is only a mild inhibition of the tyrosinase in the melanocytes, it only has a very limited effect on excessive pigmentation