Most of us use make-up and beauty products without giving a second thought. What we don't pay attention to while buying the products are the potentially harmful ingredients present in them. While they may make you look and feel good cosmetologist Nandita Das suggests not to buy products which contain these ingredients. 1. Sulfates Sulfates are what that causes your body soaps cleansers and shampoo to foam up. However in most cases sulphates have been known to cause skin irritation. Avoid buying products that contain sodium laurel sulphate. 2. Parabens Parabens are preservatives that are found in most cosmetic products.