It is known that sun exposure increases the risk of skin cancer, but the risk depends on the type of skin. People with lighter skin have lower levels of melanin in their skin, which provides them with less natural protection against UV radiation.
Dermatologists classify skin types into six categories, from I being the lightest. People with category IV skin type or more are more protected from sun UV radiation, thanks to higher levels of melanin in their skin.
92% of the world's population live in cities that do not comply with the World's Health Organization's air quality standards.
A recent ongoing study could potentially also discover a link between air pollution and skin aging.
Contaminants materials resulting from pollution affect the skin and can cause premature aging, pigmentation spots, or even acne.
The skin operates as a protection against pollution but this function can be weakened by pollutants, and lead to toxicity in human organs.
Some components of air pollution are called ambient particulate matter (PM), which can be created by volcanic activity or combustion of fossil fuels, or even the production of chemicals. There has been increasing evidence showing that human skin exposure to PM has negative effects attached to it, such as an increase in the risk of developing eczema, and even a modification of the physiological properties of skin. The mechanisms of how this happens are not well know.
The skin is very sensitive to humidity levels to which it is exposed. A high level of humidity makes it more prone to host harmful bacteria, increase the risk for rashes and general irritation. A low level of humidity can make the skin dry up.
Research has shown that exposure to heat can generate the production of elastotic material in skin, and cause severe skin aging.
A study has shown that Caucasians leaving in Australia, where temperatures and sun exposure is higher, have experienced accelerated skin aging compared to Caucasians living in the UK, the US and Canada.
Only the project owner can select the next research path.