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SEATTLE — <\/span>Fire and medical officials have issued warnings about a supplement offered to Western wildland firefighters who have been exposed to toxic chemicals<\/a> while battling some of the country’s biggest blazes.<\/p>\n The supplement glutathione, given through an IV or an inhaler-like machine called a nebulizer, has not been proven to be safe or effective and could expose firefighters to illness if there is contamination while it’s produced, experts say. <\/p>\n At least two pharmacies recalled the supplement in August due to bacterial contamination found during testing at their labs, with one saying it had received reports of people suffering from fever, chills, severe headache and other symptoms.<\/p>\n \u201cBecause glutathione is not an FDA-approved drug, consumers should be cautious about product safety and claims that glutathione can treat or prevent diseases,\u201d said a safety advisory<\/a> issued last week by the International Association of Firefighters, a labor union representing some 360,000 first responders. <\/p>\n Glutathione was offered to firefighters during recent blazes that destroyed hundreds of buildings in and around Spokane, Washington<\/a>. During morning briefings, medical unit leaders on scene from California urged crews to check out a tent where a nonprofit run by licensed naturopathic doctors offered the supplement.<\/p>\n A group of naturopaths called The Integrative Health Action Network had previously provided the supplement to firefighters during the January 2025 wildfires<\/a> that tore through Los Angeles County. The group\u2019s work with firefighters began following a 2017 blaze<\/a> that destroyed thousands of homes in California\u2019s wine country. <\/p>\n Though there is no evidence to back its use, some firefighters have said the supplement helped them feel better after breathing toxic smoke and they have urged California pharmacy officials not to restrict access. <\/p>\n The supplement’s promotion in Spokane prompted physicians and some members to contact the IAFF with concerns about health claims despite no research proving those claims or showing the supplement’s safety, said Sean DeCrane, IAFF assistant to the general president for health and safety. Some doctors have warned of adverse effects.<\/p>\n The IAFF also received reports saying some firefighters felt worse or became sick after getting treated. Medical treatments being marketed to firefighters should be evaluated and tested to make sure there are no unintended consequences, DeCrane said.<\/p>\n In response to the safety advisory, Jen Riegle, a naturopathic doctor and co-founder of The Integrative Health Action Network, said the organization recognizes the need for peer-reviewed research on whether glutathione can reduce chemical burdens in firefighters and is \u201cactively exploring partnerships to that end.\u201d<\/p>\n