But other ingredients on the list are toxic and potentially carcinogenic, making them hazardous to use on any hair type. The result is that some of these ingredients are especially harmful to naturally curly hair while they may not damage straight or wavy hair. Natural hair has an oval-shaped cuticle, a looser cuticle layer, and has more trouble retaining moisture than other hair types. We encourage everyone to be as informed as possible about their hair and beauty products, so read those labels! We have put together a list of toxic and harmful ingredients commonly used in hair and beauty products, which we will update periodically. Did you know that 1 in 12 beauty products for black women has been rated highly hazardous? ( Source.) You probably know that relaxers contain toxic and dangerous chemicals, but you may not realize that many products for natural hair contain toxic chemicals as well.