When you put on sunscreen with chemicals like oxybenzone or avobenzone, your body absorbs more of those chemicals into your bloodstream than the FDA thinks is safe — even if you just use it normally...

When you slather on sunscreen with certain chemicals like oxybenzone or avobenzone really thickly over most of your body, your body absorbs a tiny bit of those chemicals into your bloodstream—so much that it crosses a safety alert level set by the FDA, which says, 'Hey, we need to study this more.'

When people use sunscreen heavily—covering most of their skin and reapplying it four times a day for four days—chemicals in the sunscreen get into their bloodstream at levels higher than what the FDA says should trigger safety checks.

When people use sunscreen heavily, tiny amounts of its chemicals—avobenzone and oxybenzone—can get into their blood, and scientists can measure these tiny amounts, though they’re way too small to see or feel.

When you apply sunscreen all over your body as recommended, your body absorbs some of the chemicals in it so much that they show up in your blood within a day — more than what the FDA considers a safety concern level.

When people use sunscreen heavily, oxybenzone—a common ingredient—gets into the bloodstream more than other sunscreen chemicals, reaching levels more than 500 times higher than what the FDA considers worth checking for safety.