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Pigmentation

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The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
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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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False memories represent a cognitive distortion in which individuals recall events that did not happen, or remember them in an altered form. This phenomenon highlights the brain's constructive nature in processing and recalling memories, emphasizing that memory is not a perfect representation of past events but rather a dynamic reconstruction influenced by various factors.
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Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
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Sunscreens: Misconceptions and Misinformation.

Sara Moradi Tuchayi1, Zixiao Wang2, Jiajun Yan2

  • 1Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA; Department of Dermatology, Harvard Medical School, Boston, Massachusetts, USA.

The Journal of Investigative Dermatology
|April 13, 2023
PubMed
Summary
This summary is machine-generated.

Sunscreens now offer broad protection beyond sunburn, but user misunderstanding of testing and labeling fuels misleading industry practices. Improved regulations and clearer labeling are needed for better consumer and physician guidance on sun protection.

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Area of Science:

  • Dermatology
  • Cosmetic Science
  • Regulatory Affairs

Background:

  • Sunscreens have evolved from basic sunburn preventatives to sophisticated skincare products.
  • Modern sunscreens aim to protect against daily UV and visible light damage.
  • Current sunscreen testing and labeling are often misunderstood by consumers.

Purpose of the Study:

  • To highlight the evolution of sunscreen technology and its protective capabilities.
  • To address the issues surrounding sunscreen testing and labeling.
  • To advocate for improvements in regulatory oversight and consumer information.

Main Methods:

  • Historical review of sunscreen development.
  • Analysis of current sunscreen testing and labeling practices.
  • Examination of regulatory frameworks and industry standards.

Main Results:

  • Sunscreens now provide protection against a wider spectrum of light, including UV and visible light.
  • Misinterpretation of testing and labeling leads to user confusion and potentially unsafe practices.
  • Existing regulations and labeling are insufficient for adequate consumer protection.

Conclusions:

  • Enhanced regulatory requirements are necessary for the sunscreen industry.
  • Improved policing of industry claims is crucial to prevent misleading information.
  • More informative sunscreen labeling will empower users and aid healthcare professionals.