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Data that are countable or measurable in specific units are called numerical or quantitative data. Quantitative data are always numbers. Quantitative data are the result of counting or measuring the attributes of a population. Amount of money, pulse rate, weight, number of people living in a town, and number of students who opt for statistics are examples of quantitative data.
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New data on skin photoprotection.

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This study assessed sunscreen efficacy against UVB and UVA radiation. Results show high sun protection factor (SPF) and UVA protection, with good water resistance, suggesting reduced long-term sun damage.

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Area of Science:

  • Dermatology
  • Photobiology
  • Cosmetic Science

Background:

  • Ultraviolet (UV) radiation causes skin photodamage, including photoaging and photocarcinogenesis, primarily through reactive oxygen species (ROS).
  • Effective protection against both UVB and UVA radiation is crucial for preventing UV-induced skin damage.

Purpose of the Study:

  • To evaluate the protective efficacy of three sunscreen formulations (two creams, one lotion) against UVB and UVA radiation.
  • To assess the water resistance of these sunscreen preparations.

Main Methods:

  • Sun Protection Factor (SPF) and UVA protection were tested on volunteers using Colipa and Mark et al. methodologies.
  • Water resistance was determined through a wash-off test.

Main Results:

  • The sunscreens demonstrated high SPF values (approximately 20-30) with excellent correlation between visual and colorimetric assessments.
  • A minimal 20% decrease in effectiveness after washing indicated good water resistance.
  • The formulations exhibited high SPF and UVA protection efficacy.

Conclusions:

  • The studied sunscreen formulations offer significant protection against UVB and UVA radiation.
  • Their good water resistance further enhances their protective capabilities.
  • Regular use of these sunscreens can mitigate the harmful effects of long-term UV exposure.