This is Paul Karason, the man who turned blue in 2007. He passed away, yesterday at age 62. : r/pics

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Inorganic nanoparticles in dermopharmaceutical and cosmetic products: Properties, formulation development, toxicity, and regulatory issues - ScienceDirect

Safety Assessment of Nanomaterials to Eyes: An Important but Neglected Issue - Zhu - 2019 - Advanced Science - Wiley Online Library

2023 AHA/ACC/ACCP/ASPC/NLA/PCNA Guideline for the Management of Patients With Chronic Coronary Disease: A Report of the American Heart Association/American College of Cardiology Joint Committee on Clinical Practice Guidelines