Black women looking to find safer options for hair products do have some resources and guidelines. “Look for opportunities to use fewer products,” Helm said. “When choosing a product, know which products are made with plants or that are fragrance-, phthalate- and paraben-free.” The institute has developed Detox Me, a free mobile app that offers tips for reducing exposure to harmful chemicals in personal care products.

In 2017, African-Americans spent $54 million of a total $63 million on ethnic hair and beauty aids, according to data from Nielsen. Black shoppers also spent more in the general beauty marketplace. Last year, their spending accounted for $473 million of the $4.2 billion hair care industry. Despite their disproportionate spending in the category, there has been little research on the impact these products could have on black women's health. Some black women have said they suspected the dangers of black hair products long before they had scientific data to back it up.

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As early as the 1980s, Erica Blevins recalls her mother, Rosario Schuler, questioning the damaging effects of chemical hair relaxers. Schuler couldn’t understand why stylists wore gloves to apply the straighteners, but did not protect the scalps of clients. In 1987, Schuler opened Oh My Nappy Hair, a hair salon based in Oakland, Calif., that focused on using natural products to style black women’s hair.

“When we first started the business 30 years ago, one of the reasons we went into natural hair care and tried to use as many natural products as possible is because we suspected that the relaxers that were popular back then were one of the things that added to fibroids,” said Blevins, who operates the Atlanta location, which opened in 2004.

Hairstylist Erica Blevins (right) retwists Gwendolyn Pilot’s locs at the Oh My Nappy Hair salon in downtown Atlanta. Blevins’ mother opened the first location in Oakland, Calif., in 1987 to provide black women with an alternative to the harsh chemicals in hair care products on the market. A recent study found that black women are more likely to be exposed to dangerous chemicals in the hair care products they use. ALYSSA POINTER / ALYSSA.POINTER@AJC.COM

Their options for natural hair products were limited at the time, Blevins said. But while the natural hair boom of the past 10 years has led to a host of new and more natural hair products for black women, the market hasn’t caught up to their desire for safer products.

In 2016, the Environmental Working Group (EWG), which helps consumers lead healthier lives through research and education, tested more than 1,100 products marketed to black women and tracked the toxicity of ingredients in its Skin Deep Database. The results revealed that black women who wanted to shop within the products marketed to them had fewer safe choices, said Nneka Leiba, director of Healthy Living Science for the EWG. Only 25 percent of the tested products for black women rated at the lowest level of toxicity compared to more than 40 percent of tested products in the general market.

Both the EWG and Silent Spring found hair relaxers to be among the biggest offenders. Up to 30 endocrine-disrupting chemicals were found in one relaxer sample, Helm said. Hair dyes also got low ratings from the EWG. But even chemicals considered less egregious such as parabens, which prevent bacterial growth, and diethyl salate, a solvent in fragrances, are associated with endocrine disruption and can be increasingly toxic the more products you use.

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It can be hard to make a lifestyle change, said Leiba, but for almost every category of hair care, there are safer choices for black women. “Look at all the products you are using and see how you can reduce your overall chemical load,” she said. As a consumer, she said, it is important to vote with your wallet and push companies to develop safer options.

Over the years, some hair care companies have launched new product lines in response to the demand. Many of the products are prominently marketed as being free of potentially harmful chemicals.

Alissa Haskins has been voting with her wallet for years. As the founder of an Atlanta-based group that supported black women transitioning to natural hair, she has seen more women become aware of the dangerous ingredients in products.

“There are a lot of people who don’t care and just want something that is going to help them do what they want to do with their hair,” Haskins said. “You get to a point where you start memorizing some of these ingredients and you don’t even buy the products.”

WHAT YOU CAN DO

Women looking for safer hair products can use the following resources:

Detox Me app: A free app from Silent Spring Institute helps you find potential sources of toxic chemicals. Get tips on what ingredients to avoid, recipes for natural products and reminders to help you stay on track.

Skin Deep: For more than a decade, the Environmental Working Group has ranked personal care products. It recently created a category that specifically ranks hair products marketed to black women. Use the searchable database to look up products you already use or search the rankings to find safer alternatives.

GoodGuide.com: This database of more than 75,000 products maps ingredient hazard information from government lists to 14 separate hazard endpoints to create a score from 1 (bad) to 10 (good) for a range of products including hair care.