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Related Concept Videos

Mutations01:35

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Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
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Studying Chronic Exposure of Mice to Ultraviolet B Radiation
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Insufficient Sun Exposure Has Become a Real Public Health Problem.

Lars Alfredsson1, Bruce K Armstrong2, D Allan Butterfield3

  • 1Institute of Environmental Medicine, Karolinska Institute, 171 77 Stockholm, Sweden.

International Journal of Environmental Research and Public Health
|July 17, 2020
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Summary
This summary is machine-generated.

Insufficient sun exposure is a major public health issue linked to numerous diseases and deaths. Moderate sun exposure offers health benefits beyond Vitamin D, with risks managed by avoiding sunburn.

Keywords:
UV radiationdisease preventionnitric oxidesun exposurevitamin D

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Area of Science:

  • Environmental Health
  • Dermatology
  • Public Health

Background:

  • Accumulating evidence suggests insufficient sun exposure is a significant public health problem.
  • Studies indicate potential links between low sun exposure and increased incidence of various chronic diseases and mortality.
  • Vitamin D is traditionally viewed as the primary mediator of sun exposure benefits, but supplementation has shown limited efficacy.

Purpose of the Study:

  • To alert the medical community and public health authorities about the health benefits of sun exposure.
  • To highlight insufficient sun exposure as a critical public health concern.
  • To explore alternative mechanisms beyond Vitamin D for the health benefits of sunlight.

Main Methods:

  • Review of epidemiological studies and scientific literature on sun exposure and health outcomes.
  • Analysis of mortality data associated with insufficient sun exposure.
  • Investigation of potential biological mechanisms, including nitric oxide release and ultraviolet radiation effects on immune cells.

Main Results:

  • Insufficient sun exposure may contribute to hundreds of thousands of deaths annually in the US and Europe.
  • Low sun exposure is associated with increased risks for conditions including cancers, cardiovascular disease, autoimmune disorders, and neurological conditions.
  • Serum 25(OH)D may be a proxy, not a mediator, for sun exposure benefits, suggesting other pathways like nitric oxide release are involved.

Conclusions:

  • Individuals living outside the tropics should ensure adequate sun skin exposure.
  • Careful management of sun exposure is crucial to avoid sunburn and minimize risks.
  • Short, incremental sun exposure (5-30 minutes daily, depending on skin type and UV index) is recommended during high UVR seasons.