This is due to a series of harmful biochemical reactions occurring in a process known as photoaging. Chronic or prolonged solar damage negatively affects the dermal connective tissue and skin metabolism. It also depresses immunity and increases inflammation through the production of MMPs which degrade collagen and cause a loss of skin suppleness (Taihao 2009). Pollution is another factor influencing skin ageing (Vierkötter 2010). Recent studies have correlated particle pollution with advanced ageing in humans.
Sunlight has UV photons that we humans can’t see but can damage our skin. There are UVB rays and UVA rays, UVB rays are short wavelengths and don’t get deep into our skin so they are the main cause of sunburn + skin cancer but UVA rays have a longer wavelength and go deep into the skin and are the cause of early aging. (1) The Sun can Harm us because the sun emits dangerous UV rays, luckily the ozone layer absorbs most of these UV rays but the ones that do get to the surface can be dangerous to our skin and can cause Sunburn and ,in worse cases , Skin cancer. SunBurn is reddening,swelling of the skin and can cause blistering and peeling of the skin, when you spend a long time outside on a sunny day and you are exposed to UV rays our
Doctors believe that exposure to UV rays of the sun, and tanning lamps/beds are the leading cause of melanoma. (2) If you are a young toddler and get a severe sunburn this may be a risk of skin cancer later in life. People in whom live in very warm places all year around such as Australia, Hawaii, and Florida have a larger chance of developing skin cancer, this is because their bodies are exposed to the sun daily. Also in some of the colder northern locations with the country having very light skinned people will also have a higher risk. Majority of the people that develop skin cancer are probably addicted to getting that perfect tan.
UV radiation is a form of energy from natural and artificial sunlight. Excess amounts can cause damage to DNA in the skin. Although some argue tanning is good for you because it helps form a “base tan” and the UV exposure time is controlled. The truth is, each time you lay in a tanning bed, it increases the risk of developing skin cancer
It turned out to be stage 1B Melanoma (Leonard). Is the tan really worth it? Having to spend hours at doctors appointments to get rid of the cancer. Researchers estimate that indoor tanning may cause upwards of 400,000 cases of skin cancer in the U.S. each year ("Indoor Tanning Industry Under Scrutiny”). Some of these cases lead to Melanoma which is the most dangerous type of skin cancer that exists.
Intrinsic factors and extrinsic factors, both contribute to this process. As discussed earlier, UV-induced damage to the DNA causes a poor renewal of the skin. When exposed to harsh sunlight, an individual is also exposed to the UV light that comes along with it. Excessive exposure can cause premature aging in certain individuals and also is observed as severe pigmentation and sunburns as well. The antioxidants, namely vitamin E and vitamin C are majorly targeted by the UV light and thus, reduce the antioxidant capacity of the epidermis on prolonged exposure.
It is mostly screened out by ozone but that is changing with the increasing depletion of the Ozon layer. Although UV has benefits some of which are production of vitamin D, role in vision of vertebrates and invertebrates, formation of pigments in plants, it also has many negative effects. It is known that UV causes skin cancer, damages eyes and tissues and leads to different ecological effects. (Yagura et al., 2011) Consequences of UV irradiance on humans, plants, animals and the whole ecosystem are numerous. It has been shown that artificial UVC does extreme damage to exposed tissues.
Abstract: This essay talks about the radiation from sunshine and the effects that it bring to the human body. Admittedly, the sunshine the body some benefits, such as boosting the body’s supply of vitamin D and enhancing the mood. However, while people are receiving profits, they are also be influenced by some drawbacks. The long time exposure to sunlight brings people quite harmful effects and even destroy people’s skin. The UV radiation can be classified as UVA, UVB and UVC.
The large star that we call the Sun can be very helpful by providing us with vitamin D which enlightens our mood and keeps us optimists. Although in some cases sunlight exposure, especially too much of it can be very harmful to our health and skin. There are many different irritations that can be caused from too much sunlight, one of the most popular and common is sunburn. There was a survey and over one third of adults and up to 70% children had said that they have had sunburn in the past year (according to the cdc) 1. Sunburn is when your skin reddens, maybe swells up and sometimes even the blistering or peeling of the skin.
Both types of rays have photons and photons when released to the skin can cause free radicals which cause chemical reactions in nearby cells. This could easily cause you cancer and affect your DNA. UVA is one of the types of rays. UVA does, when exposed to the skin in a certain amount, can later on, have your skin age prematurely. They send off longer wavelengths which penetrates deeper into your skin.