African-American women who used permanent hair dye had a 45% higher risk. However, research has revealed that the use of chemical hair products increases Black women's risk for cancer even more.
Among 46,709 participants, the researchers from the National Institute of Health reported that women who permanently dyed their hair before participating in the study were 9% more likely to develop breast cancer than those who didn't color their hair.
The study also claimed to find racial differences in the results, with black women who use dyes every five to eight weeks or more associated with a 60pc increased risk of breast cancer, compared with 8pc for white women.
There are many different formulas for hair dye and straighteners, which have evolved over time, making it hard to pin down which ingredients might contribute to an increased risk of breast cancer.More news: A smile from Carmelo Anthony reveals more than happiness, it shows evolution
"There is an increasing number of cases of breast cancer among women globally and in Ghana and we at Breast Care have increased awareness and education on preventive measures to reduce cancer deaths" she added. And also because breast cancer is the second leading cause of cancer death for American women.
Ultimately, no level of alcohol use is safe when it comes to breast cancer, but if you're going to drink, less is still better than more, Dr. McTiernan says.
"Researchers have been studying the possible link between hair dye and cancer for a long time, but results have been inconsistent", she said. But here's the thing: African-American women are more likely to relax their hair (74 percent compared to 8 percent of white women). The study did not look at the specific ingredients in the products women were using, only at whether they had used the product and whether they developed breast cancer.
Should women stop using these products? .More news: Trump says China trade deal might have to wait for 2020 election
"We are exposed to many things that could potentially contribute to breast cancer, and it is unlikely that any single factor explains a woman's risk", Sandler said in a statement.
OTIS BRAWLEY: We've got numerous studies to show us in the laboratory that these hair dyes, and especially hair straighteners, cause cancer in laboratory animals.
"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.
The risk was notably higher among black women.More news: Turkey says no change in objection to North Atlantic Treaty Organisation plan on Baltics
NEIGHMOND: For both races, there was no increased risk for women who used semi-permanent or temporary dyes, the kind that eventually wash out with shampooing.