Watch the label: Here’s how sulfates can affect your hair – Atlanta Journal Constitution

The most common sulfate is sodium lauryl sulfate (SLS), found in most shampoos and conditioners. Another common sulfate is sodium laureth sulfate, which is found in body wash, face wash, shampoo and even in toothpaste. Some people develop an allergic reaction to it over time, according to Dr. Justin Dragna. One other concern with sodium laureth sulfate is that it is sometimes contaminated with 1,4 dioxane, a known carcinogen (or cancer-causing agent).