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Examination of the Most Effective Sunscreen

CSEF · 2016 Product Science (Biological) (Junior Division Only)

Audrey L. Robinson · Harvest Ridge Cooperative Charter School, Newcastle, Placer County

Overview

Objectives/Goals The objective of this study is to determine which sunscreen is the most effective. Methods/Materials I tested four brands of sunscreen using three testing methods: ultra violet beads, a UV meter and Sun-sensitive paper. Results The Ultraviolet beads and UV Meter were not satisfactory testing methods. I then focused my efforts on the sun-sensitive paper and repeated my trials three times for each sunscreen. The sunscreen with the most zinc oxide was the most effective. Conclusions/Discussion Repeated trials of sunscreen on sun-sensitive paper proved the sunscreen with the most zinc oxide had the best protection against UV rays. It is concluded that sunscreen with at least 10% of zinc oxide is the most effective.

Summary statement

I showed that zinc oxide based sunscreens provide the most protection from the sun.

Help received

None. I researched methods and tested the sunscreens on my own.

Competition history

  • CSEF 2016 Product Science (Biological) (Junior Division Only) · Entry J1920

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