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Friday, 23 March 2018

Exposure to sunlight helps a person improve his health because

  By GK Planet Team       Friday, 23 March 2018
Q. Exposure to sunlight helps a person improve his health because
  1. the infrared light kills bacteria in the body
  2. resistance power increases
  3. the pigment cells in the skin get stimulated and produce a healthy tan
  4. the ultraviolet rays convert skin oil into Vitamin D
Answer: The ultraviolet rays convert skin oil into Vitamin D

Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and multiple other biological effects. In humans, the most important compounds in this group are vitamin D3 (also known as cholecalciferol) and vitamin D2 (ergocalciferol). Cholecalciferol and ergocalciferol can be ingested from the diet and from supplements. Only a few foods contain vitamin D. The major natural source of the vitamin is the synthesis of cholecalciferol in the skin from cholesterol through a chemical reaction that is dependent on sun exposure (specifically UVB radiation). Dietary recommendations typically assume that all of a person's vitamin D is taken by mouth, as sun exposure in the population is variable and recommendations about the amount of sun exposure that is safe are uncertain in view of the skin cancer risk.
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Thanks for reading Exposure to sunlight helps a person improve his health because

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