2023 Author: Anita Thornton | [email protected]. Last modified: 2023-11-27 18:44
To better protect yourself, it is good to know the effects of the sun. Its rays, its seasons, the vitamin D it absorbs, here are some facts about the sun.
UVA and UVB
Just as the sun emits visible light, it also emits many invisible rays. Most are reflected by the Earth's atmosphere, but ultraviolet rays or UV rays can reach the Earth's surface. UV rays with long wavelengths belong to the category of UVA while those with short wavelengths belong to the category of UVB.
Most of the UV rays that reach us (98%) are UVA rays. They contribute to tanning and are associated with premature skin aging, wrinkles and skin cancer. Although UVB rays represent only 2% of rays, they are the main cause of sunburn, premature aging and skin cancer.
The UV Index is often used in newspapers, on television and in Internet weather reports. He can guide you in choosing the most appropriate protection against UVA and UVB rays. When choosing a sunscreen, it is essential to choose one that protects you from bothUVA and UVB rays (look for “broad spectrum” on the product).
A vitamin is an essential substance for the body, but it must be administered, because the latter is unable to synthesize it or produce enough of it. Typically, vitamin D comes from foods like fortified milk or fish. The sun (especially UVB rays) helps the skin to produce or photosynthesise a form of vitamin D. A short exposure of the hands or face to the sun, 10 minutes, two or three times a week, is enough to meet the body's needs. Any excess is simply eliminated by the body. You can also get the required amount of vitamin D by taking a daily supplement, which may be needed under northern skies during the winter months.
Therapeutic uses of different wavelengths of light
UVB rays are used by dermatologists to treat skin diseases such as psoriasis. The "blue" spectrum of light is used to treat jaundice in newborns and the "blue" and "red" spectrums can be used with certain medications to treat precancerous lesions. The entire wavelength spectrum of different lasers is used for various treatments, from freckles to wrinkles and hair removal. However, they must all be used under medical supervision, as improper use can cause burns.
Also, dermatologists do not recommend the use of tanning beds, as they can cause premature aging of the skin and an increased risk of skin cancer.
The seasons and the sun
The sun shines all year round, whatever the season. The presence of UV rays has nothing to do with the temperature outside. Whether it is -20°C or +30°C and whether the sun is visible or not, UV rays reach the surface of the Earth and have an impact on your skin. The rays may be less intense in the winter, but they're still there and they can still cause long-term damage to your skin.
In the fall, when the days are shorter, we try to take advantage of the last rays of sunshine. Now is not the time to stop using sunscreen, because it is still possible to get sunburn in the fall, even if the weather is cooler.
In winter, there are some facts to remember. Wind can cause skin irritation; it is then necessary to use a cream to protect the face. Why not choose a dual function cream that provides you with both good hydration and adequate sun protection? If you like mountain sports, remember that at high altitude the sun's rays are stronger; the protection is therefore less since the atmosphere is less dense. UV rays are reflected by snow, which can increase their impact. It is very important to apply sunscreen andreapply to exposed areas, such as the face, back of the neck and ears.
When the spring sun comes, everyone rushes outside, tired of being locked up all winter. Protect yourself. The sun's UV rays can also be reflected by sand, concrete, bitumen or metal, which increases their intensity. They can also pass through window panes; if you drive a lot, compare your forearms, and you might be surprised at the difference. Applying sunscreen should become a year-round habit, not just in the summer months.
If you like water sports, remember that water can also reflect the sun's rays and increase sun damage. Sunscreens can be diluted in water or when wiping with a towel; re-apply a layer of sunscreen when exiting the water. Be mindful and protect yourself from the sun, and you and your whole family can enjoy a he althy outdoor lifestyle.
Here are some other summer facts to consider: Most clothes, especially summer ones, offer minimal UV protection. Many traditional summer clothes provide well below the recommended SPF of 15. Loose fabrics, such as linen, wool, and lightweight cottons, provide less protection than tight-textured garments. If light passes easily through a fabric, it means that its SPF is minimal; then you mustapply sunscreen accordingly. There are new clothes on the market that provide good protection against the sun; for the most part they are made in Australia and have a label indicating the SPF, a very useful information. Children should be encouraged to wear long shorts and long sleeves. There are even garments made of a material similar to neoprene, which provide effective protection against the sun and are comfortable to wear.
Text provided by Coppertone
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