Ultraviolet (UV) radiation is everywhere! To block UV rays from penetrating the skin, it is essential for us to get a throughout understanding about the biggest enemy of our skin!
UV rays can be divided into UVA and UVB. UVA is able to penetrate deep into the dermis, causing skin darkness, inelasticity, wrinkles and fine lines. UVB, meanwhile, can only reach the epidermis and will cause skin redness, inflammation and an increase of melanin. The simple conclusion is that UV protection is crucial in preventing the skin from sun damage.
UV Rays Present All Year Round
The UV index measures the extent to which UV rays affect human skin. The higher the UV index, the higher the chance of suffering from skin and eye damage, and the shorter the time required to cause such damage. Whether it’s a sunny, cloudy or rainy day, UV rays are present all year round which means sun protection should always be in your mind. It is recommended to apply sunscreen products 15 to 30 minutes before you go out into the sun.
What are SPF and PA?
SPF is the abbreviation for sun protection factor and it refers to a sunscreen’s ability to shield you from the sun’s ultraviolet UVB rays. The higher the SPF, the higher the sunscreen’s efficacy.
In general, it takes about 10 minutes without sunscreen for a person’s skin to start burning. An SPF 15 product will prevent skin from burning for 15 times longer – so about 150 minutes. PA, meanwhile, refers to the Protection Grade against UVA radiation and is often labelled as PA+, PA++, PA+++ with the more plus signs indicating greater efficacy and protection.
How to Choose the Right Sunscreen Product?
SPF15 is able to shield from 93% of UVB rays, while SPF30 and SPF50 are able to shield 96% and 98% respectively. To achieve a more comprehensive sun protection result, the Hong Kong Consumer Council recommends consumers to choose SPF30 or SPF50 products with a minimum level of PA+++.
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