Benzophenone-3

This ingredient is also known as oxybenzone, and is one of the older organic UV filters. Its main job is sitting in the oil phase and soaking up UV photons (primarily UVB with some short-wave UVA II range).

At low levels, oxybenzone also pulls double duty as a formula stabilizer that protects fragrance and colorants from fading in the light.

On concentrations:

• It's allowed up to 6% in the US
• The EU recently tightened restrictions; it's allowed 6% in face, hand, and lip products, 2.2% in body products, and 0.5% can be used to protect the formula.

So why did the EU cut back on how much you can use?

It comes down to absorption. Oxybenzone passes through skin more easily than other filters.

When the FDA tested sunscreens, every filter showed up in people's blood above the level where the agency wants extra safety testing done. But Oxybenzone showed up at by far the highest levels of the bunch.

To be clear, the FDA's point was that we need more research and not that the ingredient is dangerous. They also said to keep using sunscreen.

That high absorption, plus some animal studies pointing to effects on reproduction, is why EU regulators labeled Benzophenone-3 a hormone disruptor in 2025. An official classification is expected to follow in 2026.

It's also the most common photoallergen among sunscreen filters so it's a more frequent cause of contact/photoallergic dermatitis than most alternatives.

Places like Hawaii and Palau have also banned it over coral-reef concerns.