This large, prospective study provides firmer evidence of a link.
Time reports, the study followed 46,700 US women between the ages of 35 to 74 to ask them questions about their lifestyle-including their hair product use.
"I am so sad that my youthful ombre may be at risk, as a woman of a certain age who regularly colors her hair", Police said. Whereas the white women were associated with 8 percent risk of breast cancer. And the use of hair straighteners was linked to an 18% increased risk of cancer.
"Women who reported using permanent hair dye or chemical straighteners had a higher risk of developing breast cancer over an eight-year follow-up period", says Alexandra White of the National Institutes of Environmental Health Sciences.
It found white women who used permanent hair dye had a seven percent increased breast cancer risk.
Those who used these products every eight weeks or more often had a 60% higher risk. The research did not look into the specific ingredients contained in the products used by the study's participants.
White noted that the study tracked a relatively small group of women who actually developed cancer, and the disease is nearly never caused by one thing alone. White women who use hair dye does not have any significant risk. "These results suggest that chemicals in hair products may play a role in breast carcinogenesis". But since the people in the database all had a family member with breast cancer, their risk of developing the disease was already above that of the general population.
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"Hair dyes are one of the most thoroughly studied consumer products on the market".
688,000 Food Stamp Beneficiaries Could Lose Coverage Under Trump Rule A new rule finalized by the Trump administration is tightening work requirements for food stamp recipients, chiefly single able-bodied adults who cannot show that they work more than 20 hours a week, according to NPR. This new treatment, commonly called a Brazilian blowout, contains formaldehyde, while earlier hair straightening treatments did not.
Despite the findings, an oncologist with Johns Hopkins University told NPR it doesn't mean that use of dyes and straighteners are definite risk factors.
At this time, more research is needed to confirm those hypotheses, but Sandler says it is important for doctors to make note of the differences in hair textures.
Even the researchers admit that the study, while noteworthy, must be taken in greater context.
The risk was substantially higher among black women.
The study's co-author Dale Sandler adds that Black women's coarser and thicker hair may also absorb more dye. "But it should raise questions for our primary care providers".