January's Skincare Trend Report: What's Worth It, What's Noise

Often it isn't. Studies and dermatologists have flagged widespread sunscreen misinformation on social media — from 'sunscreen causes cancer' to anti-SPF and DIY trends. Rely on dermatologists and primary sources (AAD, FDA, peer-reviewed research) rather than viral claims.

The evidence is mixed but reassuring: most studies find that sunscreen, as people actually use it, does not cause vitamin D deficiency — partly because no one blocks 100% of UV. If you're concerned, dietary sources and supplements are a safer route than deliberate unprotected sun exposure.

For the vast majority of people, no — major dermatology bodies consider sunscreen safe and effective, and the proven risks of unprotected UV (skin cancer, premature aging) are far greater. The FDA is studying how some chemical filters are absorbed, but absorption alone does not mean harm.