Expiring sunscreen - usually about 3 years after the date of purchase. Always remember to check the expiration date on sunscreen and if it is overdue, don't use it.0: 00/2: 55 NAMKEM domain sun protection expires because their active ingredients are decomposed according to time. When you buy a bottle of sunscreen, notice Date (expiry) of the cream jar. If there is no date stated on the label, the FDA regulations require sunscreen to be used within 3 years after the date of purchase
. However, the effectiveness of sunscreen also depends many factors. Exposure to harsh temperature or light - like a bottle of ice cream in your car in the summer - will increase the speed of sunscreen reduction. Because heat breaks the active ingredient protection against UV rays
This will also occur at room temperature, but much slower. That's why "sunscreen needs to be maintained at room temperature and not much contact with light" Why do the sunscreen expires? There are two main sun protection creams: Chemistry and objects Ly. Both protected from UV rays, but use different components. This greatly affects the use of these sunscreen. Activated components in most types of sunscreen Chemistry is the variations on the benzene ring, with a stable structure that allows molecules to absorb ultraviolet light. Over time and in harsh conditions, the round links will be broken and the compound will no longer available Effectively in preventing harmful UV rays. For physical sunscreen, there is often a lot of skin lotions, in which active ingredients, such as zinc oxide or titanium dioxide. Smooth nanoparticles in zinc oxide and Titanium dioxide is dense than the surrounding environment and over time, they will gather together, become unevenly distributed in the cream. As a result, when you apply Sunscreen, the protection is uneven on the skin. What happens if you use the expired sunscreen? The lower the SPF, the higher the risk of using the expired sunscreen
A SPF 15 sunscreen vial may have the same active ingredient with a Vial SPF 50, but the SPF 15 vial will have lower active ingredients. So if it expires, the SPF 15 bottle may have lost almost all the ability to protect you from ultraviolet radiation. Therefore, it is necessary to buy a new sunscreen bottle every year to be fully efficient. Do not use a bottle of sunscreen too long. Over time, the components in the sunscreen are broken and this can cause allergic reactions and irritation. Moreover, once sunscreen has expired, mold and bacteria can grow in ice cream and cause skin infections. However, it is necessary to remember a bottle of sunscreen just how you protect yourself from the damage of rays UV. Clothes, hats with rims, in shade, avoid sunlight when the highest ultraviolet intensity and UV-ray shade are also effective ways to protect your skin. And it is important that they don't expire! The sun protection conclusion expires - usually about 3 years after the purchase date. Always remember to check the expiration date on sunscreen and if it is overdue, don't use it. It is likely that the active ingredients in sunscreen have been reduced and it will no longer be effective ./. CTV Hoang Danh / VOV.VN (translation) According to INSIDER . Dịch vụ:
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