I recently read this on 2:48am and thought that I'd warn anyone out there who uses Head and Shoulders that it has been written in Arab times that it has been proven that (Deuxan) is present in the shampoo and it causes cancer, cirrhosis and kidney fibrosis. They warned people from using Head and Shoulders. Actually, when I read this I tossed the shampoo in the trash. If you're using Head and Shoulders I hope that you stop using it soon because whatever good it's doing to your hair isn't worth the risk of getting cancer or cirrhosis and kidney fibrosis. Besides, there are many other alternatives. To read the article, click here.