To give you a guide, we have compiled a selection of tooth whitening methods so you can see how often to use them safely. For full guidelines however, please refer to the manufacturers directly for the most up to date and specific instructions.

How Often Should You Bleach Your Teeth With Opalescence?

Opalescence is a make of at-home teeth whitening products which are dispensed by licensed dental professionals. They sell several different strengths of teeth whitening products, ranging from 10% to 45%. Depending on which one you go for, you could be using it for 15 minutes per session for a few days, or leaving it on overnight.

How Often Should You Whiten Your Teeth With Crest 3D Whitestrips?

The Crest 3D Whitestrips can be used back to back on consecutive days for up to 20 days, but only wear each strip for the time limit directed in the instructions. A slightly different variant, the Crest 3D Monthly Whitening Boost Whitestrips are designed to be used for 1 hour, once a month.

How Often Should I Whiten My Teeth With Activated Charcoal?

Many journal articles including this study have concluded that charcoal is an unproven method of teeth whitening. It is also naturally abrasive like baking soda, and some dentists have reported findings that it actually gets trapped into the pores of the teeth, which would have a darkening effect on the teeth – the opposite to what you are looking for! It is better to stick to proven, and medically tested methods of teeth whitening, like at-home kits.

How Often Should I Whiten My Teeth With Baking Soda And Lemon?

It is not advisable to use this method to whiten teeth at all. Baking soda is naturally abrasive and lemon juice is highly acidic and can demineralise your tooth structure. It also does not involve using fluoride, which is a substance that helps to strengthen teeth and prevents cavities from forming, and which is present in toothpastes and often even in tap water.

Using this baking soda method can severely damage the enamel on your teeth which can cause yellowing, sensitivity and decay as time goes on. It can also weaken dental glue, so should not be used if you have braces. Similarly, baking soda should not be used with peroxide for the same reasons.