“3-benzylidene camphor (3-BC) (…) is used in sunscreen products in EU, at a maximal concentration of 2% .
After topical application to rats for 65 days (60–540 mg/kg/day) 3-BC was detected in all analyzed tissues, including the brain (concentration 0.13–1.2 μg/g), suggesting that similar disposition and distribution may occur in humans . Though not detectable in urine of Danish children , the compound was found in human placenta .”
“Unfortunately, the effects of repeated, long-term and low-dose exposures to single compounds and mixtures of various UV filters is also poorly studied. More studies are needed to evaluate the realistic hazard of contemporary sunscreens. Furthermore, it is also timely and meritorious to advance studies on alternative, safer and more efficient UV filters.”