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Light skin is a human skin color that has a low level of eumelanin pigmentation as an adaptation to environments of low UV radiation. [1] [2] Due to migrations of people in recent centuries, light-skinned populations today are found all over the world.
Most people in the world depend on the sun to get vitamin D, [31] and elderly populations in low UVB countries experience higher rates of cancer. [32] There are not many foods that naturally have vitamin D. [33] Examples are cod liver oil and oily fish. If people cannot get sunlight, then they will need 1,000 IU of vitamin D per day to stay ...
Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, usually from the Sun.Common symptoms in humans and other animals include red or reddish skin that is hot to the touch or painful, general fatigue, and mild dizziness.
Skin cancer is one of the most common cancers in the U.S., and one in five Americans will develop it by age 70. Melanoma, the most deadly form of skin cancer, is rising in younger men . So proper ...
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Excessive exposure to ultraviolet rays has negative health effects, including sunburn. Some people tan or sunburn more easily than others. This may be the result of different skin types and natural skin color, and these may be a result of genetics. [2] [3] The term "tanning" has a cultural origin, arising from the color tan.
The American Academy of Dermatology recommends using a sunscreen with a sun protection factor (SPF) of 30 or higher and one that is “broad spectrum,” meaning it protects against both UVA and ...
Sense of direction is the ability to know one's location and perform wayfinding. [1] [2] It is related to cognitive maps, spatial awareness, and spatial cognition. [3] Sense of direction can be impaired by brain damage, such as in the case of topographical disorientation. Humans create spatial maps whenever they go somewhere.