Does Baking Soda and Peroxide Whiten Teeth?
The baking soda and peroxide combo is one of the oldest DIY whitening tricks going. It isn't pure myth - but the homemade version carries real risks that the internet tends to skip. Here's the honest breakdown.
Does it actually work?
Partly. Baking soda is a mild abrasive that can scrub away some surface stains, and peroxide is a genuine bleaching agent. So a paste of the two can make teeth look a bit brighter. The problem isn't whether it does something - it's the lack of control over how strong, how abrasive, and how often, which is exactly where DIY goes wrong.
The real risks
Enamel abrasion. Too much baking soda, too often, can wear enamel down - and it doesn't grow back.
Gum irritation. Uncontrolled peroxide concentrations can irritate gums.
Guesswork. No measured strength, no timing, no consistency - the opposite of how safe whitening works.
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If you still want to try it
If you do use baking soda occasionally, keep it gentle and infrequent, never scrub hard, and don't make it a daily habit. And if you have sensitive teeth, gum issues, or dental work, give it a miss and ask your dentist what's appropriate instead.
Frequently asked questions
Is baking soda bad for teeth?
Occasional gentle use is generally tolerated, but frequent abrasive scrubbing can wear enamel over time.
How often could I use the paste?
Sparingly at most - it's not a daily routine. A formulated product is the safer regular option.
What's a safer alternative?
Controlled-dose whitening strips, or optical purple strips that don't bleach at all.
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Purple colour-correcting whitening strips — a visibly brighter smile without the peroxide zing.
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This article is for general educational purposes and isn't a substitute for advice from your dentist or doctor. If you have sensitivity, gum issues, or dental work, consult a dental professional before trying DIY whitening.