The most popular products that black women buy relate to hair care — coloring, bleaching, and relaxing. These happen to be the most toxic, with an average product score indicating high hazard....
“Laboratory tests on some products commonly used by Black women, including hair and skin lotions, conditioners and creams, showed estrogenic or anti-estrogenic activity, meaning that they mimicked the effects of the hormone estrogen. Other studies have found that Black Americans had higher urinary concentrations of parabens, the hormone-disrupting chemicals commonly used as preservatives in personal care products, pharmaceuticals and foods.”
My hair has always been intolerant of relaxer and color both, so henna and that's it for me. But the list at the link below has a list of all sorts of hair products that the SKIN DEEP DATABASE is in the process of testing. I'd keep checking back there from time to time to see what's safe, what's still being tested etc.
PRELIMINARY SAFETY RATINGS HAIR PRODUCTS FOR BLACK WOMENhttp://www.ewg.org/skindeep/browse/hair+products+for+black+women/