All teeth whitening procedures are based on one of two principles which are physical action against stains or chemical reaction. You can read more about how teeth whitening works here.
Natural methods to whiten your teeth are no exception, they either consist in finding materials which will gently polish your teeth when rubbing them repeatedly (like a sanding paper) or look for ingredients which contain the chemicals that will react with the microscopic film of foreign material that forms on top the enamel over time. Some natural chemicals might even react with the enamel making it shinier.
Natural teeth whitening solutions usually take longer than bleaching and other chemical solutions, however their effectiveness when used for periods of at least 30 days has been proven and there are many public figures, including actors an politicians who trust the color of their smile to all natural teeth whitening products.
At home solutions
You can make your own teeth whitening products at home with natural ingredients you can buy at the grocery stores. There are many recipes for this kind of solutions, most of them including baking soda, which acts as the polishing material, mixed with jams or juices in order to create a sort of paste that you can apply with your toothbrush.
Some at home solutions might also include coconut oil which contains lauric acid that acts against some of the bacteria found in plaque that are partly responsible for making your teeth yellow.
Apple cider vinegar as well as lemons and oranges also contain some acids which can help whiten your teeth, although then need to be applied for periods of time of at least 30 days in order to see any results.
Over the counter solutions
If you are looking for a natural product to whiten your teeth that won’t involve you playing Breaking Bad in your kitchen, then natural powders are probably the best option.
Most natural powders are made out of charcoal. It’s dark, almost black color might surprise you, you might ask yourself how can something black help me whiten my teeth? Well charcoal powder falls into the physical whitening methods, acting as a very gentle polisher which will break the film of foreign material that forms over your teeth over time making them look yellow.
Not all whitening powders are 100% natural, some contain different materials and chemicals that are meant to give you a faster result.
If you want to make sure you chose a 100% natural powder you should look for trusted brands such as Diamond Dust who produces a tooth whitening powder which is 100% organic, vegan, gluten free and made in the USA.