Skin and Hair care: Sun Protection
UVAS & UVBS: TWO GOOD REASONS
TO PROTECT YOUR SKIN
The sun produces several types of ultraviolet rays. Although UVs represent only a tiny proportion of the sun rays that reach the Earth, they are very powerful. There are several types of UV rays: UVCs, which are filtered out by the ozone layer, and UVAs and UVBs, which reach the surface.
UVAs are present year-round and represent 95% of the UVs that reach the Earth’s surface. They can penetrate the skin deeply, down to dermal cells. UVAs can alter cells in the long term and lead to photoaging, sun allergies (redness, itching), pigmentary disorders (spots, pregnancy mask). The damages caused by overexposure to the sun can lead to the development of skin cancer.
UVBs represent 5% of the UV rays that reach us. They are very high-energy and though they are stopped by clouds and glass, they can penetrate the epidermis. These rays can give you a tan, but also a burn (sunburns), allergic reactions, and skin cancer. This is why it is important to protect your skin both from UVAs and UVBs.
Moreover, some cancer treatments cause your skin to be more sensitive to sunlight. Therefore, even low amounts of sun exposure can lead to adverse effects.