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Viral anti-sunscreen content on social media has convinced over 16 million U.S. adults to reduce or stop using sunscreen — despite no scientific evidence of widespread harm. A dermatologist at the ASDS Annual Meeting debunked top myths, from sunscreen causing cancer to blocking vitamin D. Experts are urging dermatologists to build a stronger social media presence to counter the spread of misinformation.
Social media is fueling a dangerous wave of anti-sunscreen misinformation, and dermatologists are sounding the alarm. At the American Society for Dermatologic Surgery Annual Meeting, Dr. Bassel H. Mahmoud of the University of Massachusetts called sunscreen misinformation "the most common and concerning myth" circulating online today. Hashtags like #nosunscreen are gaining traction, with content creators pushing natural wellness alternatives and claiming sunscreen is toxic — claims that have no scientific backing.
Dr. Mahmoud systematically dismantled the most viral myths: sunscreen does not cause cancer (it actually reduces risk for melanoma and squamous cell carcinoma); it doesn't meaningfully block vitamin D synthesis; and there is no such thing as a "healthy tan" — any tan signals UV-induced DNA damage. While some chemical sunscreen ingredients are absorbed into the bloodstream, there is currently no evidence this causes harm.
By the Numbers:
Why it matters: With 80% of Americans on social media and non-physicians dominating dermatology content, misinformation spreads fast — and the real-world consequences, including increased skin cancer risk, are significant. Dermatologists are being called to build a stronger, evidence-based presence online.
