Does sunscreen protect against radiation? Can it still be used after being opened for a year?

Sunscreen is a skin care product used to be applied on the face. It is extremely necessary in the summer. So does sunscreen protect against radiation? Can sunscreen still be used after one year of opening?

Does sunscreen protect against radiation?

Sunscreen does not protect against radiation.

Because the main active ingredient in sunscreen is the sunscreen ingredient, and the sunscreen ingredient only has the function of blocking ultraviolet rays. It can only help girls resist the harm of ultraviolet rays, but cannot help girls protect against radiation.

Can sunscreen still be used after one year of opening?

Sunscreen can be used one year after opening if it has not exceeded its shelf life, but it is recommended that girls should not use sunscreen after opening for one year. Because after the sunscreen is opened, as the number of times it is used increases, the number of times it comes into contact with bacteria and microorganisms in the air will also increase, thus affecting the sunscreen ingredients inside. So if girls open the sunscreen and use it again after a year, the sunscreen will not have the same sun protection effect as before.

Sunscreen cannot protect against radiation, but it can be used if it has not expired one year after opening.