As I get older, I want to whiten my teeth more.

As I get older, my tooth color gradually turns yellow.

Drinking a lot of coffee must also have an effect.

It used to be okay not to brush after eating, but now I have to brush immediately after eating, or else plaque builds up too much.

Are teeth whitening toothpastes without whitening effects ineffective?

I'm considering whitening treatment because I heard there might be side effects like tooth sensitivity.