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Lucknow. Sunscreen is considered to be the biggest protective shield to protect the skin from scorching sun, harmful ultraviolet (UV) rays and premature wrinkles. Dermatologists strongly recommend applying sunscreen in every season. But do you know that your favorite sunscreen also expires after a certain time? Often people keep using the same sunscreen tube for years, without thinking whether it is effective or not. According to dermatologists, applying expired sunscreen does not provide any protection to the skin, rather it can cause serious allergies, rashes and pimples on the face. Let us understand directly from doctors what is the shelf life of sunscreen and what are the signs of its spoilage.
In how many days does sunscreen expire?
Generally, the shelf life of most sunscreens is from the date of manufacture. 2 to 3 years It is up to. However, according to medical experts, once the sunscreen bottle or tube is opened, its effectiveness may be limited. 12 months (1 year) It gradually starts decreasing inside. According to FDA rules, it is mandatory for sunscreen to have an expiry date, but if for some reason the date on the tube has been erased, then it should not be used at all after 3 years of purchase.
According to dermatologist: 3 main signs that sunscreen is bad
If your sunscreen shows the following changes, throw it in the trash immediately because it has expired:
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Change in texture and consistency (Separation of Ingredients): When sunscreen starts to deteriorate, the water and oil or chemicals present in it separate. If when you take out the sunscreen from the tube, instead of a thick cream, a thin watery liquid or oil comes out, then understand that it is no longer fit for use.
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Change in Color: A fresh sunscreen is usually white or slightly tinted. But if the color of your sunscreen has started turning light yellow, muddy or transparent, then it is a clear indication that its active ingredients have been completely destroyed.
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Strange or unpleasant smell (Bad Odor): When the preservatives present in sunscreen become ineffective over time, bacteria start growing in it. If any strange, pungent or chemical smell starts coming from the sunscreen, then never forget to apply it on the face.
Serious harm and prevention of applying expired sunscreen
According to doctors, facial skin can become a victim of sunburn by applying spoiled sunscreen, because its SPF (sun protection factor) becomes ineffective. Apart from this, clogged pores increase the risk of severe acne, redness and skin infections on the face. To keep sunscreen safe for a long time, never keep it in direct sunlight, in humid places like car dashboard or bathroom. Always store it at normal room temperature (Cool and Dry Place).