We use it all year round, so how long is the shelf life of the cream after opening?
The shelf life of unsealed sunscreen is 1~3 years. If it has been opened, it is better to use it up within one year, because contact with air and improper preservation will lead to the sunscreen effect is greatly weakened, but also lead to skin allergy.
Many people think that sun protection is only needed in summer, but it’s not.
Sunscreen is to be done all the year round, whether it is sunny or rainy, ultraviolet rays will not disappear, reduce the damage of ultraviolet rays on our skin, we need to use sunscreen.
But many people don’t know the expiration date of sunscreen and how long it should last.
So when buying sunscreen, pay attention to the expiration date of the product on the package.
Some are labeled “6M” or “12M”, which means the product should be used within six or 12 months.
This is the recommended duration of use if the sunscreen has been opened. If the sunscreen is not opened, it can be stored for 1 to 3 years.
Sunscreens protect against the sun by adding titanium dioxide and zinc oxide, which are more stable and do not deteriorate over time.
But there are many other ingredients added to sunscreens besides these two, and there’s no guarantee that they won’t deteriorate when exposed to high temperatures and prolonged exposure to air.
Some people do not pay attention to the storage environment when storing sunscreen, directly put in the high temperature exposure, which will also lead to the use of sunscreen for a shorter time, and more likely to cause sunscreen deterioration.
So keep sunscreen in a cool, dry environment.
Long exposure to air and the effects of high temperatures after sunscreen is opened can also breed some bacteria.
Had OPENED A YEAR WHEN SUNBLOCK SO, ORIGINAL BASK IN BASK IN EFFECT ABATE DO NOT SAY, STILL CAN INCREASE THE BURDEN OF SKIN, CAUSE SKIN ALLERGY.
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