There have been several articles circulating regarding plastics found in the oceans and sea salt. Selina Naturally has gone the extra step in testing their salt in response to the recent ‘micro plastic’ publications. As of June, 2017 they sent a 1lb bag of their Light Grey Celtic to McCrone Associates, Inc. Laboratory to perform a Food Forensic Analysis and were pleased to see the results were clear, "No rubber or plastic-like material was visible". They are committed to continuing to pursue the best testing methods to maintain the integrity you expect with our sea salt.