I don't pretend to even have a clue how this stuff works but it does. You simply rub a quarter's worth into your hair, rinse it out and shampoo as usual and once your hair is dry, it will be silky, shiny and well nourished. It must protect the hair from harmful chemicals and or drying agents as I have to use a prescription shampoo which is drying to my hair and has left it feeling thin and fly-away prone. But not since using this product. Beware, a little goes a long way. It can leave your hair looking wet or oily if you use too much. Simple to use.