How long does it take for sunscreen to be unopened before use? The best effect is achieved within the same year.

How long can you not use sunscreen after opening it? No matter what kind of cosmetics, they all have a shelf life, girls should know it, right? So do girls know the shelf life of sunscreen? If you don’t know, let’s learn about it together below~

How long can you not use sunscreen after opening it?

It is best recommended to use up the sunscreen within the same year after opening it, and not save it for next year. Because after the sunscreen is opened, the number of times it comes into contact with the air will increase with the number of times it is used, and it will be affected by the microorganisms and bacteria in the air, which will affect the sunscreen ingredients inside, making its sunscreen effect not as good as it was at the beginning. Therefore, it is recommended that girls use up the sunscreen in the same year~

What will happen if you use sunscreen next year?

If girls do not finish using up this year's sunscreen and save it for use next year, it is very likely that the sunscreen ingredients in it have lost their original effectiveness, so there will be no sun protection effect if girls use it again, so it is meaningless to use it. At the same time, it is also possible that the sunscreen has been contaminated because it has been stored for too long, and has bred some bacteria that are invisible to the naked eye. If it is used again, it is likely to cause skin discomfort such as redness, swelling, hotness, and stinging. Therefore, girls are advised not to save the sunscreen for use next year.