Hi all, I am 22 years old with normal health. I love cold drink very much. My father told me to stop drinking so much diet coke and diet Pepsi. It is my favorite beverage and I drink diet cokes or diet Pepsi about once a day. I usually have three or four diet cokes or diet Pepsi once a day. He said it is not good for my bones. I want to know is it true? Is diet coke or diet Pepsi really bad for your bones? Please answer seriously.