Is sunscreen bad for you? What the FDA's own studies found

Why this question keeps coming back

"Is sunscreen bad for you" is one of those searches that spikes every summer and never really goes away, usually fed by a new headline about chemicals in blood or contamination in a specific bottle. The honest answer requires separating two different findings that get blurred together: what FDA-funded research found about chemical filters being absorbed into the body, and a separate, unrelated scandal about a contaminant called benzene turning up in some products during manufacturing.

What the FDA's own absorption studies actually found

In 2019 and a 2020 follow-up, FDA researchers ran trials published in JAMA testing how much of a sunscreen's active ingredients show up in the bloodstream under normal, maximal-use conditions. Avobenzone, oxybenzone, octocrylene and ecamsule showed up in the first trial; homosalate, octisalate and octinoxate were added in the second. All of them were absorbed into plasma at levels above the FDA's own threshold for potentially waiving additional toxicology testing on a drug ingredient.

That sounds alarming in isolation, but the FDA's own scientists were careful about what it means. "Should not be interpreted as meaning that the FDA considers the ingredients as unsafe," is how David G. Strauss, one of the study's authors at the agency, put it, adding that the result simply pointed to a need for further testing under the standard rules that apply to any drug used chronically with measurable systemic absorption. Sunscreen's active ingredients are regulated as over-the-counter drugs in the US, which is why this bar exists at all.

The benzene scare was a different problem entirely

Separately, in May 2021, the independent testing lab Valisure filed a citizen petition after finding benzene, a well-established human carcinogen, in 78 of 294 sunscreen and after-sun product batches it tested, about 27%. Fourteen of those batches measured above 2 parts per million, with the highest reading at 6.26 ppm. Benzene is not a sunscreen ingredient on any label; it most likely entered certain products, disproportionately aerosol sprays, through contamination in a propellant or manufacturing process rather than as part of the formula itself. That distinction matters: this was a quality-control failure in specific batches and brands, not evidence against sunscreen's active ingredients as a category.

What dermatology organizations actually say to do

The American Academy of Dermatology's position has not moved on the core question. "Current scientific data does not support claims that sunscreen ingredients are toxic or a hazard to human health," its then-president Henry Lim said in a statement reissued as these questions resurfaced, a line the organization has repeated across multiple safety scares over the past decade. That stance sits alongside a sobering number the AAD also publishes: about 1 in 5 Americans will develop skin cancer at some point in their life, and melanoma alone is projected to account for well over 200,000 new US diagnoses this year. Skipping proven protection over an unresolved absorption question is a trade dermatologists consistently argue is the wrong one, a theme that runs through plenty of other everyday-exposure questions we've looked at, like whether the clothes on your back are doing you any harm.

The US sunscreen aisle is actually behind other countries

Part of why this debate keeps circling back to the same handful of older chemical filters is that the US has approved far fewer sunscreen active ingredients than Europe or Asia. In December 2025, the FDA proposed adding a new filter called bemotrizinol, which the Academy's own statement framed bluntly: the United States lags behind many other countries that have nearly twice as many approved sunscreen ingredients. More approved filters generally means formulas that need less of any single ingredient and more options for people trying to avoid a specific one, so this is a case where the regulatory system, not the underlying science, has been slow to catch up.

If you want to avoid the chemical filters anyway

You don't have to resolve the absorption question to sidestep it. Mineral sunscreens built on zinc oxide or titanium dioxide work by sitting on top of the skin and physically blocking or scattering UV light, rather than absorbing into it, so they are not implicated in the FDA's bloodstream findings. They protect just as effectively against sunburn when applied correctly, though some people find them harder to rub in without a visible white cast.

Our take

The absorption finding is real and worth the FDA's continued safety testing, and the benzene contamination was a genuine manufacturing failure worth checking your own cabinet against recall lists. Neither one adds up to evidence that sunscreen itself is dangerous, and the far larger, well-documented risk remains unprotected sun exposure. If the chemical filters bother you, switch to a mineral formula. Don't switch to nothing.

This is general information, not medical advice. Talk to a clinician before changing anything, especially if you are pregnant, nursing, or managing a condition.