Clinical trial looks at absorption levels of sunscreen active ingredients into bloodstream

The US Food and Drug Administration recommends that active ingredients in sunscreen absorbed into the bloodstream above a certain level undergo toxicology testing. Researchers from the FDA conducted this small randomized clinical trial of 24 healthy volunteers to determine bloodstream concentrations of four active ingredients (avobenzone, oxybenzone, octocrylene and ecamsule) in four sunscreens applied four times per day for four days with blood samples collected from study participants over seven days.
Source: EurekaAlert,