"As with all cosmetics and personal care products, companies are required to substantiate the safety of hair dyes and straighteners and individual ingredients before marketing to consumers, and the labeling of those products must be truthful and not misleading", concluded PCPC.
It's a question stylists face repeatedly over the years: can coloring or straightening your hair cause cancer? According to a new finding, the use of permanent hair dyes and straighteners can increase the risk of this chronic disease, especially in African American women.
Those who used these products every eight weeks or more often had a 60% higher risk.
"The majority of the cohort studied were non-Hispanic white, well educated, and economically well off. Women recruited for the study were at higher risk for breast cancer". Now, new research is adding some disturbing points to it. NIEHS (National Institute of Environmental Health Sciences) conducted research and got data in the sister study from 46709 women.More news: Senior NHS staff urge frontline health workers to get flu jab
They provided researchers with updates over a follow-up period of approximately eight years.
"Women who used chemical straighteners had an 18 percent increased risk". "In our study, we see a higher breast cancer risk associated with hair dye use, and the effect is stronger in African American women, particularly those who are frequent users". All of the women had a sister who'd been diagnosed with breast cancer, but they didn't have breast cancer themselves at the start of the study. However, black women are more likely to use them, with about 75% of black women in the study reporting they straighten their hair.
Researchers analyzed data from almost 47,000 US women, followed for an average of more than eight years as part of the federally funded Sisters Study. The study was published Wednesday in the International Journal of Cancer.
The group of scientists discovered little to no rise in breast cancer risk for semi-permanent or impermanent dye use.More news: Alanis Morissette And Jimmy Fallon Go Undercover Busking In NYC Subway
For perspective, across the U.S. about 1 in 8 women will develop an invasive breast tumour over their lifetime.
Which chemical can cause breast cancer?"But maybe this is something that science simply just can not answer".
But to even begin to make sense of the statistics, we need to look behind the results and include some other numbers.
74% of the Black women studied reported using chemical straighteners, compared to 3% of white women.More news: Joshua to get £46m, Ruiz £10m for rematch
Alcohol consumption, too, is more clearly linked to risk of breast cancer than chemical dyes and straighteners, he said.