Hi, I am twenty seven years old. I recently read somewhere that it is better if you change your beauty products after certain time. I want to know is it true? I heard about this La Mer Cream from a colleague. I want to know does it really work. She was telling me that it is really effective and will do wonders to my skin. I want to know anyone it from someone who used the product? I have normal skin. Kindly tell me how many times in a day should I use the cream to get best result. Thanks