10/4/2023 0 Comments Sun reflector for tanning face![]() There are two different mechanisms involved in the production of a tan by UV exposure: Firstly, UVA radiation creates oxidative stress, which in turn oxidizes existing melanin and leads to rapid darkening of the melanin. Cross-sectional view showing skin tone becoming darker due to the production of more melanin to overcome DNA damage caused by UV radiation The intensity is commonly measured by the UV Index. The tanning process can be triggered by natural sunlight or by artificial UV radiation, which can be delivered in frequencies of UVA, UVB, or a combination of both. With the production of the melanin, the skin color darkens. Excessive UV radiation causes sunburn along with other direct and indirect DNA damage to the skin, and the body naturally combats and seeks to repair the damage and protect the skin by creating and releasing further melanin into the skin's cells. Melanin protects the body by absorbing ultraviolet radiation. Melanocytes produce two types of melanin: pheomelanin (red) and eumelanin (very dark brown). Melanin is a natural pigment produced by cells called melanocytes in a process called melanogenesis. Long-term Photoaging of a woman.Įxcessive exposure may in the long-term increase the risk of skin cancer, as well as depressed immune system function and accelerated aging of the skin. Its origin lies in the Western culture of Europe when it became fashionable for young women to seek a less pale complexion (see Cultural history below). The term "tanning" has a cultural origin, arising from the color tan. This may be the result of different skin types and natural skin color, and these may be a result of genetics. Some people tan or sunburn more easily than others. Moderate exposure to direct sunlight contributes to the production of melanin and vitamin D by the body.Įxcessive exposure to ultraviolet rays has negative health effects, including sunburn. ![]() Impact on skin health Moderate exposure A sun tanned arm showing browner skin where it has been exposed Some people use chemical products which can produce a tanning effect without exposure to ultraviolet radiation, known as sunless tanning. People who deliberately tan their skin by exposure to the sun engage in a passive recreational activity of sun bathing. It is most often a result of exposure to ultraviolet (UV) radiation from sunlight or from artificial sources, such as a tanning lamp found in indoor tanning beds. Sun tanning or tanning is the process whereby skin color is darkened or tanned. For the 2013 album by Deafheaven, see Sunbather (album).Ī visible tan line on a woman whose skin has been darkened by ultraviolet exposure, except where covered.
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