Chemical sunscreen is safe for the vast majority of people, and every major dermatology organization recommends using it over going unprotected. That said, a few ingredients have raised legitimate questions about hormonal effects and skin absorption, which is why the FDA has been reassessing certain filters. Here’s what the evidence actually shows and what it means for your daily sunscreen choices.
How Chemical Sunscreen Works
Chemical (also called organic) sunscreen filters absorb UV radiation and convert it into small amounts of heat that dissipate from your skin. This is different from mineral sunscreens, which sit on top of the skin and physically scatter UV rays. Common chemical filters include avobenzone, octinoxate, homosalate, and oxybenzone. Most modern chemical sunscreens combine several of these to cover both UVA and UVB wavelengths.
The concern isn’t really about how they block UV. It’s about what happens after they absorb into your skin, because unlike mineral filters, chemical filters do enter the bloodstream in measurable amounts. That absorption alone doesn’t mean harm, but it’s what prompted the FDA to request more safety data.
The Oxybenzone Question
Oxybenzone is the most studied and most controversial chemical filter. According to Health Canada’s review of the evidence, studies in human populations suggest possible skin allergy, developmental effects (such as changes in birth weight), and hormone disruption, including effects on testosterone and thyroid hormones. These findings come primarily from observational studies, which means researchers found associations but haven’t proven that oxybenzone directly caused those outcomes.
Health Canada also notes an important caveat: the presence of a substance in your body doesn’t necessarily mean it will affect your health. The doses people absorb from sunscreen are far lower than the doses that produce clear hormonal effects in lab animals. Still, oxybenzone has been the ingredient most likely to trigger contact allergies, especially in children. Many sunscreen brands have already reformulated to remove it, so avoiding oxybenzone specifically is easy if it concerns you.
What the FDA Says Right Now
The FDA currently classifies only two sunscreen ingredients as “Generally Recognized as Safe and Effective” (GRASE): zinc oxide and titanium dioxide, both mineral filters. That doesn’t mean chemical filters are unsafe. It means the FDA asked manufacturers to submit additional safety data on chemical filters and hasn’t yet received enough to make a final determination. The process has been slow, stretching back to a 2019 proposed rule.
There’s movement, though. In 2025, the FDA proposed adding bemotrizinol, a newer UV filter widely used in Europe and Asia, as a GRASE ingredient at concentrations up to 6 percent. If finalized, this would be the first new sunscreen filter approved in the U.S. in decades. Bemotrizinol is considered photostable (it doesn’t break down in sunlight as quickly as avobenzone) and has a strong safety profile based on years of international use.
Why European Sunscreens Have More Options
The U.S. currently approves far fewer UV filters than Europe. The reason is regulatory, not scientific. In Europe, UV filters are regulated as cosmetics, while in the U.S. they’re regulated as drugs. The drug approval pathway requires more extensive data, which has created a bottleneck that kept newer, potentially better filters off the American market for years.
Filters like bemotrizinol, DHHB, and phenylene bis-diphenyltriazine have been available in European and Asian sunscreens for over a decade. These newer filters tend to be more photostable, offer broader UV coverage, and have favorable safety profiles. This is partly why “Euro sunscreens” have become popular with American consumers who order them online. The practical takeaway: if you’re worried about older chemical filters like oxybenzone, newer-generation filters (whether from European products or upcoming U.S. approvals) address many of those concerns.
The Benzene Issue Was a Manufacturing Problem
In 2021, independent testing found benzene, a known carcinogen, in dozens of sunscreen products, triggering recalls. This understandably alarmed people, but it’s important to understand what happened. Benzene is not a sunscreen ingredient. The contamination likely came from certain compounds in spray propellants that mixed to form benzene during manufacturing. Researchers flagged that any detectable levels up to 2 parts per million should be cause for concern.
The problem was largely limited to aerosol spray formats. Lotion and cream sunscreens were far less affected. Several brands voluntarily recalled contaminated batches, and manufacturers have since addressed their propellant formulations. If benzene contamination worries you, choosing a lotion or cream over an aerosol spray essentially eliminates the risk.
How to Get the Most Protection
Regardless of which type of sunscreen you use, the biggest real-world risk factor is applying too little or not reapplying. Most adults need about one ounce (roughly a shot glass) to cover all exposed skin, and at least one teaspoon just for the face. Studies consistently show people apply only 25 to 50 percent of the recommended amount, which dramatically reduces the SPF they actually get.
Reapply every two hours when you’re outdoors, and immediately after swimming or heavy sweating. This applies to both chemical and mineral formulas. Chemical sunscreens can degrade in direct sunlight over time (avobenzone is particularly prone to this), which makes reapplication even more important if you’re using an older-generation chemical product.
Putting the Risk in Perspective
Skin cancer is the most common cancer in the United States, and UV exposure is its primary preventable cause. The potential risks from chemical sunscreen ingredients, while worth studying, are measured in subtle hormonal shifts seen in population-level data. The risk from unprotected sun exposure is measured in millions of skin cancer diagnoses per year. No dermatology organization has recommended that people stop using chemical sunscreen based on current evidence.
If you want to minimize any theoretical risk while staying protected, you have practical options: choose a mineral sunscreen (zinc oxide or titanium dioxide), look for chemical formulas that have dropped oxybenzone, or seek out products with newer-generation filters like bemotrizinol. Use lotion or cream formats instead of aerosol sprays. And apply enough of whatever you choose, because an underapplied “safe” sunscreen protects you less than a properly applied chemical one.