Have You Been A Frequent User of Chemical Hair Straighteners and Been Diagnosed With Uterine, Endometrial, or Cervical Cancer?

Hair straightening products contain chemicals called phthalates. Also known as “plasticizers,” phthalates are added to hair straighteners to relax the hair and create a softer feel.

Yet phthalates are dangerous. And manufacturers of these products likely knew for years.

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If you’ve been diagnosed with uterine, endometrial, or cervical cancer and have frequently used of chemical hair straighteners, call MyPhillyLawyer today.

In 2022, the National Institutes of Health (NIH) reported the results of an 11-year study tracking cancer rates among women who used chemical hair straighteners. The study followed 33,497 women between the ages of 35 and 74.

In the eleven years they participated in the study, over three hundred and seventy women reported uterine cancer diagnoses. A diagnosis of uterine cancer was more likely among women who said they used hair straightening products five or more times each year. Researchers estimated that only 1.64 percent of women who never used hair straighteners would develop uterine cancer by age seventy. When women used hair straighteners at least four times a year, that number jumped to over four percent – more than twice the risk.

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"According to the study, women who self-reported using straightening products are more likely to develop uterine cancer than women who don't"


"Hair products such as dye and chemical straighteners/relaxers contain a number of chemicals that may act as carcinogens or endocrine disruptors and thus may be important for cancer risk"


"Mitchell’s uterine cancer was directly and proximately caused by her regular and prolonged exposure to phthalates and other endocrine disrupting chemicals found in Defendants’ hair care products."

What Makes Hair Straighteners Dangerous?

Hair straightening products contain chemicals called phthalates. Also known as “plasticizers,” phthalates are added to hair straighteners to relax the hair and create a softer feel.

Yet phthalates are dangerous. Multiple studies have shown that phthalates can disrupt the endocrine system – the parts of the body that manage hormone production and uptake.

While the effects of phthalate exposure vary depending on the type and amount of phthalates involved, endocrine disruption from phthalate exposure has been linked to many hormone-related problems, including a higher risk of uterine cancer.

Buyers of these hair straighteners often had no way of knowing that the product contained dangerous chemicals. Manufacturers of these products, however, likely knew for years.

Product Liability Claims Involving Hair Straighteners

Product liability claims seek to hold a manufacturer or distributor responsible for dangerous hidden defects in their products.

Hair straightening product cancer claims already filed in court suggest that at least one manufacturer knew as early as 2015 that phthalates were linked to severe health risks and shouldn’t be used in hair straightening products. However, these companies continued to put phthalates in their hair straighteners.

Both manufacturing and warning defects may apply in hair straightener cases. Including cancer-causing chemicals in hair products incorporates dangerous substances into the product itself. Also, many hair straighteners on the market fail to warn users about the presence of certain chemicals by listing these ingredients as “fragrance” or “perfume” rather than by their specific names.

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