The reason for using the shampoo is to keep scalp and hair clean. Ironically, some shampoos are actually a reason for hair loss, and they damage hair roots badly. Shampoo manufacturing companies add these ingredients in shampoos for fragrance or foaming purposes. Check the ingredients list of the shampoo and don’t buy it if an excess amount of Sodium Lauryl Sulfate and Laureth Sulfate is present in it. Likewise, sodium chloride is very harmful to the health and growth of hair. Those who have skin allergies must not go for the shampoos, which contain parabens and propylene glycol as they cause scalp irritation.