July 2025 in “Journal of Investigative Dermatology” Some sunscreen ingredients may be linked to hair loss, but more research is needed.
February 2015 in “Rivm (National Institute for Public Health and the Environment)” This report summarizes data from The Netherlands' cosmetovigilance system from 2009-2014, finding that facial and hair products commonly caused undesirable skin reactions like erythema and itching, with severe cases occasionally involving hair loss and respiratory issues.
March 2019 in “Reactions Weekly”