Does vitamin C make you black during the day?

Vitamin C is an antioxidant that helps reduce free radical damage to the skin, thus helping to keep the skin healthy and shiny. There is no scientific study showing that taking vitamin C during the day can cause skin darkening.

Second, skin color is mainly determined by the amount and distribution of melanin. Melanin production is affected by many factors, including genetics, UV exposure, hormone levels, etc. Vitamin C is not directly related to melanin production.

However, it should be noted that vitamin C alone does not prevent UV damage to the skin. During the day, it is still necessary to take appropriate sunscreen measures, such as using sunscreen, wearing hats and sunglasses, to protect the skin from UV damage.