what go smile product do you recommend for teeth whitening?

i was gonna try either the am or lemonade toothpaste… what do you recommend out of all their products for teeth whitening in terms of good results? i just want to buy ONE product. thanks for answering:)

What teeth whitening product would you recommend?

I will be getting braces off soon and have had them on for a solid 3 years. I really need a very effective teeth whitening product, over the counter. Any ideas? Thanks!