Nowaday, shampoo will solve one problem and create another so that you'll end up buying the whole range. Don't believe? Try the anti-druff ones and you'll end up with oily hair. Then buy one for oily hair and you'll end up with dry hair. Buy one for dry hair and you'll end up too drying. Then go for moisturising one and end up with dandruff all over again. Maybe even hair dropping off. 
