Can anyone suggest a good product or natural remedies that can effectively help whiten teeth?

Brushing with baking soda before or after is a really easy way to whiten teeth, and it's not difficult to find in stores (obviously!). I've heard lemon juice with baking soda is also effective. Check out this link for more suggestions, but I personally find baking soda to be the most practical. http://everydayroots.com/teeth-whitening-at-home