Sunscreen
Like certain foods, the sun could be every bit as carcinogenic, as proved by millions of Americans afflicted with skin cancer. Wherever there are sunscreens however, the sun may be just a life-giving ball of light.
Every week, one is exposed incidentally to 18 hours of sunlight, which radiates ultraviolet (UV) rays. Even when it’s very cloudy or frosty, these rays of light will ultimately penetrate through – as much as 40 percent. UV rays can even reach those in the shade.
Emanating UV rays, sunlight can raise the risk of sunburn, blood vessel dilation, freckles, and skin damage. Sunlight also accelerates the appearance of wrinkles, in a phenomenon called photoageing.
One can live with sunlight by using chemical agents called sun blocks or sunscreens. They fend off ultraviolet (UV) radiation by either deflecting UV rays away from the skin or absorbing them.
A numerical value called Sun Protection Factor (SPF) could be used to tell the effectiveness of a sunscreen. However, SPF only gauges the effectiveness of the sunscreen in blocking one UV ray – UVB. Another type of ray, UVA ray, is just as dangerous.
Broad-spectrum or multi-spectrum sunscreen is in order then, to protect against both harmful rays. For UVB protection, SPF 15 is recommended but those with photosensitive skin or prone to skin cancer may opt for higher factors.
Since nothing could detect how much a sunscreen could block UVA rays yet, consumers must buy products that contain any of these chemicals: avobenzone, ecamsule, titanium dioxide, oxybenzone, zinc oxide, or sulisobenzone.
Experts recommend around an ounce of sunscreen daily for optimum sun protection, more for activities with longer exposure. One must reapply as needed or in two-hour intervals, especially after swimming, sweating, and excessive toweling. Luckily, water-resistant sunscreens are available, such that they are effective even after 40 minutes of submerging.
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