Vitamin c should be protected from light, because it is afraid that the tablets will decompose when exposed to light. You've eaten it in your stomach, so you're not afraid that the pills won't glow. You can eat it during the day.

Arbutin is mainly used for whitening skin. As long as you pay attention to whether the skin is allergic to it, you can use it sooner or later.

Copy interpretation:

Arbutin will be reduced to hydroquinone after being absorbed by the skin, which leads some people to doubt the safety of arbutin and think that arbutin still has the chance to produce side effects similar to hydroquinone. The most commonly heard statement is that "skin care products containing arbutin should not be used during the day, otherwise they will not turn white, but will be darker".

In fact, the addition of ingredients to skin care products is clearly defined. Only arbutin with extremely high concentration has photosensitivity, and the upper limit of arbutin concentration in skin care products is 7%. In this concentration range, arbutin is not enough to produce photosensitivity, so it does not need to be used in the dark. Arbutin is absorbed by the skin, and when it is decomposed by light, it will be reduced to hydroquinone, resulting in whitening effect. The concentration of hydroquinone in arbutin skin care products is less than 20ppm (that is, 20 parts per million). At such a low concentration, hydroquinone will not cause side effects such as skin blackening.