The Food and Drug Administration (FDA) conducted an OTC drug review of Ethylhexyl Methoxycinnamate and did approve it for use in OTC sunscreens up to a concentration of 7.5%. However, it has been known to produce excess reactive oxygen species that can interfere with cellular signaling, cause mutations, and lead to cell death. This reaction may also be implicated in cardiovascular disease. As always, ingredients applied to skin may cause allergic reactions. One instance of this reaction was published in Contact Dermatology but was not significant enough to discourage FDA approval.