A viral claim circulating online in late June 2026 falsely suggested that a major scientific study found sunscreen users face dramatically higher risks of skin cancer, but the research actually concluded the opposite. The study cited in the rumor did not find that sunscreen itself increases cancer risk. Instead, researchers identified a phenomenon called the "sunscreen paradox," where people may develop a false sense of security and spend more time in the sun without properly reapplying sunscreen.

What Did the Study Actually Say?

The research in question was published in the November 2023 issue of Cancer Epidemiology, Biomarkers & Prevention and examined gene-specific environmental interactions related to sun exposure and skin cancer risk. The study analyzed factors including sex, hair color, skin color, and sun protection use in a large cohort of participants. Researchers found that darker skin and hair colors were protective factors against skin cancer, but they found no evidence that sunscreen products themselves increased cancer risk.

In fact, the study's authors explicitly stated the opposite of what the viral claim suggested. They wrote that while frequent sunscreen use was associated with higher cancer rates in their data, this association had nothing to do with the sunscreen itself. Instead, the authors explained that the association likely resulted from people placing too much confidence in sunscreen's protective abilities, leading them to spend extended periods in the sun without adequate reapplication or other protective measures.

Why Is the "Sunscreen Paradox" Important to Understand?

The sunscreen paradox describes a real behavioral phenomenon that dermatologists and public health researchers have documented. When people believe they are fully protected by sunscreen, they may neglect other critical sun safety practices or fail to reapply sunscreen every two hours as recommended. A separate 2023 study from McGill University researchers defined this paradox as a situation where sunscreen "confers a false sense of security," ultimately leading to increased UV exposure rather than decreased exposure.

The authors of the Cancer Epidemiology study also suggested alternative explanations for the observed association. Some people in the study sample who used more sunscreen might have been doing so because they had already received a skin cancer diagnosis and were trying to prevent recurrence. Others may have been using sunscreen improperly by failing to reapply it throughout the day, which significantly reduces its effectiveness.

How to Protect Your Skin From UV Damage

• Apply Sunscreen Correctly: Use sunscreen with broad-spectrum protection and reapply every two hours, or immediately after swimming or sweating. The study's authors emphasized the importance of adequate and frequent sunscreen use to minimize skin cancer risk.
• Combine Multiple Protection Methods: Sunscreen is most effective when paired with other sun protection strategies. The McGill University research found that UV-protective clothing and avoiding the sun altogether were actually more effective at preventing skin cancer than sunscreen alone.
• Avoid Extended Sun Exposure: Even with sunscreen, limiting the amount of time you spend in direct sunlight, especially during peak UV hours between 10 a.m. and 4 p.m., reduces your overall skin cancer risk.

Where Did the False Claim Originate?

The claim that the study found sunscreen increases cancer risk appears to have originated from a social media post by Nicolas Hulscher, described as an epidemiologist working for the McCullough Foundation, a conservative nonprofit organization. The post claimed that "the single LARGEST sunscreen-skin cancer study EVER conducted found sunscreen users face dramatically higher risks of EVERY major skin cancer." This characterization directly contradicts the study's actual conclusions and methodology.

The same epidemiologist also appeared on "The Matt Gaetz Show" on the conservative network OAN to share the alleged findings, and a video of that appearance circulated alongside various versions of the false claim. Some versions of the claim circulated with links to stories that cited only other social media posts rather than the actual peer-reviewed research.

What Does the Research Actually Recommend?

The authors of the Cancer Epidemiology study concluded their findings by emphasizing that their research "demonstrates the importance of adequate and frequent sunscreen use and minimization of exposure to UV light, particularly in individuals with fair skin." They stressed that understanding how genetic variation interacts with demographic, environmental, and behavioral factors is essential to fully appreciate the complex nature of skin cancer risk.

Previous investigations into sunscreen safety have also addressed other viral claims about the product. A Snopes fact-check examined claims that sunscreen enters the bloodstream and removes the body's natural defense against cancer by blocking vitamin D. While it is true that sunscreen can be absorbed into the bloodstream, there is no evidence that it causes cancer or damages the immune system.

The bottom line remains clear: sunscreen is an important tool for reducing skin cancer risk when used properly and combined with other sun protection strategies. The viral claim misrepresenting recent research should not discourage people from using sunscreen as part of their skin health routine.