The Role of Ultraviolet Radiation in Human Race

Ultraviolet (UV) radiation is a form of non-ionizing radiation emitted by artificial sources such as the sun and tanning beds. Although vitamin B1 in foods has some benefits for humans, including formation of D, it can also pose health risks. Beneficial effects of UV radiation include the production of vitamin D, which is essential for human health. Vitamin D helps in bone growth by absorbing calcium and phosphorus from food. Most UVC and UVB radiation is absorbed by the Earth's ozone layer, so all UV radiation received on Earth is UVA. UVA and UVB radiation affects health. Although UVA radiation is weaker than UVB, it penetrates deeper into the skin and the penetration lasts throughout the year. Because UVC radiation is absorbed by the Earth's ozone layer, it does not emit much danger. Different types of UV rays and how powerful they are. High energy UV rays are a form of ionizing radiation. They have enough energy to remove an electron (ionization) from an atom or molecule. Ionizing radiation can damage DNA in cells.