A friend gave me a bottle of Wen to try. Had a terrible rash on my head and a burning scalp. Thankfully no hair loss! Went to a dermatologist who recommended that I no longer use the product after testing a sample of Wen and finding that yes, there were some harmful chemicals in the product itself. After using a 100% natural peanut butter conditioning treatment to condition my hair and not shampooing for a couple of days. I went back to my regular shampoo line9from a health food store) that I used before trying out Wen. Don't believe the commercials that you see on TV with the actresses that are promoting this product. It's just hype and you wind up paying way too much money it.