Hello I am 14 and my teeth are not as white as I would like them to be. My parents will not let me have my teeth whiten by a dentist or am I able to use over the counter whiting kits. However my mom has agree to let me use toothpaste with whiting. Though she said she would only get it once and so I need to find the best one right from the start. Has anyone one used Crest 3D White Advanced Vivid Fluoride Toothpaste? I mean Crest is a good name right but I am not sure what to get since I only get one shot at whiting my teeth. Advise please.