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Clarissa Ghazi gets lye relaxers, which contain the chemical sodium hydroxide, applied to her hair two to three times a year.
A recent study that made headlines over a potential link between hair straighteners and uterine cancer is not going to make her stop.
“This study is not enough to cause me to say I’ll stay away from this because [the researchers] don’t prove that using relaxers causes cancer,” Ms. Ghazi said.
Indeed, primary care doctors are unlikely to address the increased risk of uterine cancer in women who frequently use hair straighteners that the study reported.
In the recently published paper on this research, the authors said that they found an 80% higher adjusted risk of uterine cancer among women who had ever “straightened,” “relaxed,” or used “hair pressing products” in the 12 months before enrolling in their study.
This finding is “real, but small,” says internist Douglas S. Paauw, MD, professor of medicine at the University of Washington in Seattle.
Dr. Paauw is among several primary care doctors interviewed for this story who expressed little concern about the implications of this research for their patients.
“Since we have hundreds of things we are supposed to discuss at our 20-minute clinic visits, this would not make the cut,” Dr. Paauw said.
While it’s good to be able to answer questions a patient might ask about this new research, the study does not prove anything, he said.
Alan Nelson, MD, an internist-endocrinologist and former special adviser to the CEO of the American College of Physicians, said while the study is well done, the number of actual cases of uterine cancer found was small.
One of the reasons he would not recommend discussing the study with patients is that the brands of hair products used to straighten hair in the study were not identified.
Alexandra White, PhD, lead author of the study, said participants were simply asked, “In the past 12 months, how frequently have you or someone else straightened or relaxed your hair, or used hair pressing products?”
The terms “straightened,” “relaxed,” and “hair pressing products” were not defined, and “some women may have interpreted the term ‘pressing products’ to mean nonchemical products” such as flat irons, Dr. White, head of the National Institute of Environmental Health Sciences’ Environment and Cancer Epidemiology group, said in an email.
Dermatologist Crystal Aguh, MD, associate professor of dermatology at Johns Hopkins University, Baltimore, tweeted the following advice in light of the new findings: “The overall risk of uterine cancer is quite low so it’s important to remember that. For now, if you want to change your routine, there’s no downside to decreasing your frequency of hair straightening to every 12 weeks or more, as that may lessen your risk.”
She also noted that “styles like relaxer, silk pressing, and keratin treatments should only be done by a professional, as this will decrease the likelihood of hair damage and scalp irritation.
“I also encourage women to look for hair products free of parabens and phthalates (which are generically listed as “fragrance”) on products to minimize exposure to hormone disrupting chemicals.”
Not ready to go curly
Ms. Ghazi said she decided to stop using keratin straighteners years ago after she learned they are made with several added ingredients. That includes the chemical formaldehyde, a known carcinogen, according to the American Cancer Society.
“People have been relaxing their hair for a very long time, and I feel more comfortable using [a relaxer] to straighten my hair than any of the others out there,” Ms. Ghazi said.
Janaki Ram, who has had her hair chemically straightened several times, said the findings have not made her worried that straightening will cause her to get uterine cancer specifically, but that they are a reminder that the chemicals in these products could harm her in some other way.
She said the new study findings, her knowledge of the damage straightening causes to hair, and the lengthy amount of time receiving a keratin treatment takes will lead her to reduce the frequency with which she gets her hair straightened.
“Going forward, I will have this done once a year instead of twice a year,” she said.
Dr. White, the author of the paper, said in an interview that the takeaway for consumers is that women who reported frequent use of hair straighteners/relaxers and pressing products were more than twice as likely to go on to develop uterine cancer compared to women who reported no use of these products in the previous year.
“However, uterine cancer is relatively rare, so these increases in risks are small,” she said. “Less frequent use of these products was not as strongly associated with risk, suggesting that decreasing use may be an option to reduce harmful exposure. Black women were the most frequent users of these products and therefore these findings are more relevant for Black women.”
In a statement, Dr. White noted, “We estimated that 1.64% of women who never used hair straighteners would go on to develop uterine cancer by the age of 70; but for frequent users, that risk goes up to 4.05%.”
The findings were based on the Sister Study, which enrolled women living in the United States, including Puerto Rico, between 2003 and 2009. Participants needed to have at least one sister who had been diagnosed with breast cancer, been breast cancer-free themselves, and aged 35-74 years. Women who reported a diagnosis of uterine cancer before enrollment, had an uncertain uterine cancer history, or had a hysterectomy were excluded from the study.
The researchers examined hair product usage and uterine cancer incidence during an 11-year period among 33 ,947 women. The analysis controlled for variables such as age, race, and risk factors. At baseline, participants were asked to complete a questionnaire on hair products use in the previous 12 months.
“One of the original aims of the study was to better understand the environmental and genetic causes of breast cancer, but we are also interested in studying ovarian cancer, uterine cancer, and many other cancers and chronic diseases,” Dr. White said.
A version of this article first appeared on WebMD.com.
Clarissa Ghazi gets lye relaxers, which contain the chemical sodium hydroxide, applied to her hair two to three times a year.
A recent study that made headlines over a potential link between hair straighteners and uterine cancer is not going to make her stop.
“This study is not enough to cause me to say I’ll stay away from this because [the researchers] don’t prove that using relaxers causes cancer,” Ms. Ghazi said.
Indeed, primary care doctors are unlikely to address the increased risk of uterine cancer in women who frequently use hair straighteners that the study reported.
In the recently published paper on this research, the authors said that they found an 80% higher adjusted risk of uterine cancer among women who had ever “straightened,” “relaxed,” or used “hair pressing products” in the 12 months before enrolling in their study.
This finding is “real, but small,” says internist Douglas S. Paauw, MD, professor of medicine at the University of Washington in Seattle.
Dr. Paauw is among several primary care doctors interviewed for this story who expressed little concern about the implications of this research for their patients.
“Since we have hundreds of things we are supposed to discuss at our 20-minute clinic visits, this would not make the cut,” Dr. Paauw said.
While it’s good to be able to answer questions a patient might ask about this new research, the study does not prove anything, he said.
Alan Nelson, MD, an internist-endocrinologist and former special adviser to the CEO of the American College of Physicians, said while the study is well done, the number of actual cases of uterine cancer found was small.
One of the reasons he would not recommend discussing the study with patients is that the brands of hair products used to straighten hair in the study were not identified.
Alexandra White, PhD, lead author of the study, said participants were simply asked, “In the past 12 months, how frequently have you or someone else straightened or relaxed your hair, or used hair pressing products?”
The terms “straightened,” “relaxed,” and “hair pressing products” were not defined, and “some women may have interpreted the term ‘pressing products’ to mean nonchemical products” such as flat irons, Dr. White, head of the National Institute of Environmental Health Sciences’ Environment and Cancer Epidemiology group, said in an email.
Dermatologist Crystal Aguh, MD, associate professor of dermatology at Johns Hopkins University, Baltimore, tweeted the following advice in light of the new findings: “The overall risk of uterine cancer is quite low so it’s important to remember that. For now, if you want to change your routine, there’s no downside to decreasing your frequency of hair straightening to every 12 weeks or more, as that may lessen your risk.”
She also noted that “styles like relaxer, silk pressing, and keratin treatments should only be done by a professional, as this will decrease the likelihood of hair damage and scalp irritation.
“I also encourage women to look for hair products free of parabens and phthalates (which are generically listed as “fragrance”) on products to minimize exposure to hormone disrupting chemicals.”
Not ready to go curly
Ms. Ghazi said she decided to stop using keratin straighteners years ago after she learned they are made with several added ingredients. That includes the chemical formaldehyde, a known carcinogen, according to the American Cancer Society.
“People have been relaxing their hair for a very long time, and I feel more comfortable using [a relaxer] to straighten my hair than any of the others out there,” Ms. Ghazi said.
Janaki Ram, who has had her hair chemically straightened several times, said the findings have not made her worried that straightening will cause her to get uterine cancer specifically, but that they are a reminder that the chemicals in these products could harm her in some other way.
She said the new study findings, her knowledge of the damage straightening causes to hair, and the lengthy amount of time receiving a keratin treatment takes will lead her to reduce the frequency with which she gets her hair straightened.
“Going forward, I will have this done once a year instead of twice a year,” she said.
Dr. White, the author of the paper, said in an interview that the takeaway for consumers is that women who reported frequent use of hair straighteners/relaxers and pressing products were more than twice as likely to go on to develop uterine cancer compared to women who reported no use of these products in the previous year.
“However, uterine cancer is relatively rare, so these increases in risks are small,” she said. “Less frequent use of these products was not as strongly associated with risk, suggesting that decreasing use may be an option to reduce harmful exposure. Black women were the most frequent users of these products and therefore these findings are more relevant for Black women.”
In a statement, Dr. White noted, “We estimated that 1.64% of women who never used hair straighteners would go on to develop uterine cancer by the age of 70; but for frequent users, that risk goes up to 4.05%.”
The findings were based on the Sister Study, which enrolled women living in the United States, including Puerto Rico, between 2003 and 2009. Participants needed to have at least one sister who had been diagnosed with breast cancer, been breast cancer-free themselves, and aged 35-74 years. Women who reported a diagnosis of uterine cancer before enrollment, had an uncertain uterine cancer history, or had a hysterectomy were excluded from the study.
The researchers examined hair product usage and uterine cancer incidence during an 11-year period among 33 ,947 women. The analysis controlled for variables such as age, race, and risk factors. At baseline, participants were asked to complete a questionnaire on hair products use in the previous 12 months.
“One of the original aims of the study was to better understand the environmental and genetic causes of breast cancer, but we are also interested in studying ovarian cancer, uterine cancer, and many other cancers and chronic diseases,” Dr. White said.
A version of this article first appeared on WebMD.com.
Clarissa Ghazi gets lye relaxers, which contain the chemical sodium hydroxide, applied to her hair two to three times a year.
A recent study that made headlines over a potential link between hair straighteners and uterine cancer is not going to make her stop.
“This study is not enough to cause me to say I’ll stay away from this because [the researchers] don’t prove that using relaxers causes cancer,” Ms. Ghazi said.
Indeed, primary care doctors are unlikely to address the increased risk of uterine cancer in women who frequently use hair straighteners that the study reported.
In the recently published paper on this research, the authors said that they found an 80% higher adjusted risk of uterine cancer among women who had ever “straightened,” “relaxed,” or used “hair pressing products” in the 12 months before enrolling in their study.
This finding is “real, but small,” says internist Douglas S. Paauw, MD, professor of medicine at the University of Washington in Seattle.
Dr. Paauw is among several primary care doctors interviewed for this story who expressed little concern about the implications of this research for their patients.
“Since we have hundreds of things we are supposed to discuss at our 20-minute clinic visits, this would not make the cut,” Dr. Paauw said.
While it’s good to be able to answer questions a patient might ask about this new research, the study does not prove anything, he said.
Alan Nelson, MD, an internist-endocrinologist and former special adviser to the CEO of the American College of Physicians, said while the study is well done, the number of actual cases of uterine cancer found was small.
One of the reasons he would not recommend discussing the study with patients is that the brands of hair products used to straighten hair in the study were not identified.
Alexandra White, PhD, lead author of the study, said participants were simply asked, “In the past 12 months, how frequently have you or someone else straightened or relaxed your hair, or used hair pressing products?”
The terms “straightened,” “relaxed,” and “hair pressing products” were not defined, and “some women may have interpreted the term ‘pressing products’ to mean nonchemical products” such as flat irons, Dr. White, head of the National Institute of Environmental Health Sciences’ Environment and Cancer Epidemiology group, said in an email.
Dermatologist Crystal Aguh, MD, associate professor of dermatology at Johns Hopkins University, Baltimore, tweeted the following advice in light of the new findings: “The overall risk of uterine cancer is quite low so it’s important to remember that. For now, if you want to change your routine, there’s no downside to decreasing your frequency of hair straightening to every 12 weeks or more, as that may lessen your risk.”
She also noted that “styles like relaxer, silk pressing, and keratin treatments should only be done by a professional, as this will decrease the likelihood of hair damage and scalp irritation.
“I also encourage women to look for hair products free of parabens and phthalates (which are generically listed as “fragrance”) on products to minimize exposure to hormone disrupting chemicals.”
Not ready to go curly
Ms. Ghazi said she decided to stop using keratin straighteners years ago after she learned they are made with several added ingredients. That includes the chemical formaldehyde, a known carcinogen, according to the American Cancer Society.
“People have been relaxing their hair for a very long time, and I feel more comfortable using [a relaxer] to straighten my hair than any of the others out there,” Ms. Ghazi said.
Janaki Ram, who has had her hair chemically straightened several times, said the findings have not made her worried that straightening will cause her to get uterine cancer specifically, but that they are a reminder that the chemicals in these products could harm her in some other way.
She said the new study findings, her knowledge of the damage straightening causes to hair, and the lengthy amount of time receiving a keratin treatment takes will lead her to reduce the frequency with which she gets her hair straightened.
“Going forward, I will have this done once a year instead of twice a year,” she said.
Dr. White, the author of the paper, said in an interview that the takeaway for consumers is that women who reported frequent use of hair straighteners/relaxers and pressing products were more than twice as likely to go on to develop uterine cancer compared to women who reported no use of these products in the previous year.
“However, uterine cancer is relatively rare, so these increases in risks are small,” she said. “Less frequent use of these products was not as strongly associated with risk, suggesting that decreasing use may be an option to reduce harmful exposure. Black women were the most frequent users of these products and therefore these findings are more relevant for Black women.”
In a statement, Dr. White noted, “We estimated that 1.64% of women who never used hair straighteners would go on to develop uterine cancer by the age of 70; but for frequent users, that risk goes up to 4.05%.”
The findings were based on the Sister Study, which enrolled women living in the United States, including Puerto Rico, between 2003 and 2009. Participants needed to have at least one sister who had been diagnosed with breast cancer, been breast cancer-free themselves, and aged 35-74 years. Women who reported a diagnosis of uterine cancer before enrollment, had an uncertain uterine cancer history, or had a hysterectomy were excluded from the study.
The researchers examined hair product usage and uterine cancer incidence during an 11-year period among 33 ,947 women. The analysis controlled for variables such as age, race, and risk factors. At baseline, participants were asked to complete a questionnaire on hair products use in the previous 12 months.
“One of the original aims of the study was to better understand the environmental and genetic causes of breast cancer, but we are also interested in studying ovarian cancer, uterine cancer, and many other cancers and chronic diseases,” Dr. White said.
A version of this article first appeared on WebMD.com.