Natural black hair or not, avoiding these ingredients (this list is not exhaustive though, there are also others...do some research!) is important for better hair health and overall health for all hair types. These ingredients are often found in hair styling products from gels, shampoos, conditioners, and moisturizers. They can dry out your hair, stunt its growth, cause breakage, skin break outs, dizziness, and some ingredients are known to even be linked to cancer.
Research site included:
Source: http://kinkykurlysistas.com/hair-care/item/152-reading-the-label-10-ingredients-to-avoid-when-shopping-for-%E2%80%9Cnatural%E2%80%9D-hair-products