Sunkissed beauty

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Fall is here and the last of the brilliant summer days have long gone. For my fellow temperate climate earthlings, this is an unfortunate reality. For everyone basking in tropical paradise on permanent vacay… live it up!

The body does need sufficient amounts of UVRs in order to generate Vitamin D. A study by the University of California-San Diego School of Medicine shows that vitamin D has been found to help boost the immune system in its attempt to heal wounds (here), good stuff! Low levels of Vitamin D/ light have also been found to be associated with depression (here), not-so-good stuff. So this is not meant to address moderate sun exposure but rather sun-exposure as a sport.

What are ultraviolet rays?

The sun gives energy in the form of light waves of different lengths and intensity. The sunlight we see is called visible light. Ultraviolet radiation (UVR) is located just above visible light. UVR is divided into different energy levels from longest to shortest wavelengths: UVA, UVB and UVC. (Olay)

UVA rays can be considered as ‘Aging rays’ (Think A=Aging). They have the least energy but penetrate the most deeply into the skin. It has been reported to be the least associated with skin cancer, but if delivered in high dosages can cause skin cancer, allergic and non-allergic sun-induced eruptions, darkening and pigmentation of the skin (a skin condition of great concern for darker skins, also seen as ‘freckles’ on fair to medium complexions), and acceleration of the aging process. After chronic, long-term exposure, the skin may appear dry, scaly, spotted, wrinkled and leathery.

UVB rays can be considered to be the “Burning rays” (again think B= Burn). They are the rays most responsible for imparting what is referred to as a ‘tan’, the bronzing effect. In excess, these rays can cause sunburn and can also lead to the development of certain skin cancers and are the most potent rays to reach the earth.

Which brings us to UVC rays. These rays are of the shortest wavelength, carry the most energy and are the most damaging. Fortunately they are blocked out by the ozone layer, as there is no defence against these rays by the skin. The degradation of the ozone can of course be an issue in the future. Makes you think.

The skin and its response to ultraviolet rays

One of the fundamental properties of skin is its ability to respond to UVRs. UVRs emitted from tanning beds can be just as damaging as those emitted from the sun, or even more so as you are less likely to be concerned about the effects of the UVR when you are paying to get it. Who doesn’t want to get their money’s worth? How about that complementary extra 10 minutes at the tanning salon?…

Redness, also known as erythema is the skin’s first visible signal that the skin is in jeopardy. The first *DING DING DING* alarm. It signals to the individual that you may want to head inside now and shows that the immune system is active and that the healing process has begun. Redness is usually more visible in skin types I to III and less obvious in skin types IV to VI. In the darker skin types, however the individual may experience a warming sensation on the skin.

Tanning is the second pigmentary response to UVR rays and is really a signal from the skin saying:

 “Okay then… you wanna play it like that and ignore me, fine. I’ll have to bring out the battalion.” The alarm has been sounded; all defences are up. Skin is now in overdrive.

During tanning, the skin facilitates the development of darker skin on regions of the body exposed to UVR rays. The lighter the complexion, the more the skin has to compensate for it than it does for darker complexions, all UVRs being equal. This is because darker complexions can have up to as much protection as a sunscreen of a Sun Protection Factor (SPF) 15. Sunburns are a result of the skin being stretched beyond its capacity to repair itself.

The term ‘healthy tan’ is an oxymoron; a combination of two normally contradicting terms, which in this case is normally said in error.

Didn’t think getting bronzed ‘n sexy was so complicated huh?

Tropical paradises are lovely. There is something about the yummy-ness of feeling we get when the sun hits the body, that ‘happy’ feeling… sigh.

Moderation the key. So let us act like we know.

Sources: Olay,  SunSmart, Vitamin D, Notes.

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