Whitening toothpastes will work for some people and be of no benefit to others. Everyone wants to look better and what easier way to do it by just changing your toothpaste?!
Let's do dentistry 101! Most people naturally have 32 teeth but sometimes this varies!
Teeth aren't actually that simple! There's a lot of different things that make up a tooth and they all have different roles to play. It is really a great work of engineering.