In concrete terms, sunlight is an electromagnetic wave. UVA and UVB rays come from solar radiation. They travel through space and the Earth's atmosphere before reaching us!
UVA rays are not responsible for sunburn, but they penetrate deep beneath the skin. Prolonged, repeated exposure to UVA causes damage: sagging skin, wrinkles and pigmentation spots, for example.
UVB rays penetrate less deeply into the dermis, but their impact is directly visible: redness, sunburn, itching, burns, blisters and most skin cancers.
The intensity of these rays depends on the season, the altitude and our distance from the Equator.
It all depends on your phototype (read our article: ‘Tanning and staying healthy’). Phototype 1 is the most at risk: milky skin, blond or red hair, light eyes, freckles. Phototype 6: black skin, black hair, dark eyes, which withstands solar radiation better.
What should we make of sunbeds? Artificial UV is harmful! It does not prepare the skin for tanning, and it speeds up skin ageing and the appearance of pigmentation spots.
We now know the dangers of sun exposure for the youngest. Sunburn in childhood can turn into melanoma in adulthood.
We must therefore protect our children with a sun cream of factor 50+, reapplied every two hours, and make them wear a hat, sunglasses and covering clothing (UV-protective swimsuits being the best option)… and above all not expose them between 12:00 and 16:00!
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