A recent investigation by CBC Marketplace has revealed discrepancies between the SPF numbers printed on sunscreen bottles and the actual protection provided by the products. This disparity could potentially mislead Canadians who rely on sunscreen for sun protection.
Marketplace conducted tests on a popular SPF 50 sunscreen at five accredited laboratories in Canada and the U.S. The results varied widely, with each lab reporting different SPF values of 34, 50, 60, 44, and 15 for the same product. This highlights the lack of oversight in the testing system.
The SPF number on sunscreen bottles indicates the level of protection against UVB rays. However, it does not account for UVA rays, which can also cause skin damage and cancer. Broad-spectrum sunscreens protect against both types of rays.
The testing process for SPF involves exposing human volunteers to simulated sunlight to determine the minimal amount needed to cause slight skin redness. This method, while approved by Health Canada and the FDA, has limitations due to the subjective nature of assessing sunburn levels.
Experts emphasize the importance of consistent and generous sunscreen application for effective protection. Despite the variability in SPF testing, using sunscreen remains crucial for skin health, even if the exact SPF number may not always be accurate.
Concerns have been raised about fraud in the sunscreen industry, with instances of testing manipulation leading to misleading SPF claims. Health Canada has been urged to address these issues and ensure sunscreen efficacy and safety for consumers.
Moving forward, experts recommend focusing on regular and thorough sunscreen application rather than fixating on specific SPF numbers. The key takeaway is to prioritize sun protection and use sunscreen as part of a comprehensive sun safety routine.