Unilever United States is recalling 19 dry shampoo aerosol products due to "potentially elevated levels" of benzene, a chemical known to cause cancer in humans.

The voluntary recall, which the company announced last week, impacts select dry shampoo produced before October 2021 – including products from prominent Unilever brands like Dove, Suave and TRESemmé.

Retailers across the country have been told to remove the recalled dry shampoo from shelves, Unilever said.

According to the Centers for Disease Control and Prevention, the long-term impacts of benzene exposure can include life-threatening blood disorders, significant bone marrow damage and cancer, specifically leukemia. The seriousness of benzene poisoning depends on the amount and length of exposure, among other factors, the CDC says.

Exposure can occur through breathing, eating and skin contact. The CDC notes that immediate signs of high-level exposure include dizziness, vomiting, unconsciousness and, in especially severe cases, death. Benzene is formed both naturally and through human activity, the CDC adds – noting that people nationwide are exposed to the chemical daily on various levels, from tobacco smoke to indoor paint.

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According to Unilever, an independent health hazard evaluation found that daily exposure to the benzene in its recalled dry shampoo products "would not be expected to cause adverse health consequences."

"Unilever U.S. is recalling these products out of an abundance of caution. Unilever has received no reports of adverse events to date relating to this recall," the company wrote.

An internal investigation identified the recalled products' propellant as the source of benzene, Unilever added. The company said it has worked with the propellant suppliers "to address this issue."