Hacker News Reader

Teeth whitening is very cheap, you can buy teeth whiteners over the counter in the US, and most toothpastes you can buy in the store have whitening agents in them.

View on HN

Those whiteners don't create the super-bright almost-blue color you get from the dentist.

Are you sure? The handful of times I've inquired to an acquaintance about freakishly white teeth, they've always said it was just because they took really good care of their teeth, didn't drink coffee or soda, used whitening toothpaste, and had good genes.

Are you talking about those that last just a couple of hours or different ones?

What treatment lasts a couple hours?

You can get very effective peroxide gel kits on EBay for under $20 USD that whiten for many months.

Reply on news.ycombinator.com