Commercial shampoos contain a lot of harmful chemicals that can damage your hair. For instance, sulphates are very commonly present in commercial shampoos and they make your hair really dry by stripping it off all the natural moisture from the scalp. Apart from this, not many people realize that a lot of alcohol and fragrances are also included in these basic shampoo formulas that try to cleanse your hair. Dry and damaged hair is the end result of using commercial shampoos every day without proper conditioning.