I am twenty eight year woman and i have a tough time dealing with my dry and sensitive skin.i have tried to put so many kind of lotions that are of good quality but none of them have helped me to the extent that i am satisfied and my dry skin has cured completely.then one day when my sister and her husband came for dinner to our house ,he told me that i should Cetaphil Lotion .there has to be credibility in what he says as he is a dermatologist.what does Cetaphil Lotion contain that helps to fight dry skin and make my skin soft ?