Baking soda and hydrogen peroxide teeth
Baking soda and hydrogen peroxide can alter surface stains, but a homemade mixture can irritate gums and wear enamel if it is abrasive or strongly con
The short answer
Baking soda and hydrogen peroxide can alter surface stains, but a homemade mixture can irritate gums and wear enamel if it is abrasive or strongly concentrated. Use a tested toothpaste or clinician-directed product instead.
What does baking soda contribute to a peroxide mixture?
Baking soda is sodium bicarbonate, a mild abrasive and alkaline salt. Hydrogen peroxide is an oxidising agent used in some dental whitening products; concentration, contact time, acidity, and abrasion determine its effect on enamel and soft tissue.
How can you avoid harm from homemade whitening mixtures?
Do not scrub teeth with a concentrated or gritty mixture, swallow peroxide, or apply it to ulcers or broken gums. For stain removal, use a fluoride toothpaste and have the cause of intrinsic or persistent staining assessed.
When do peroxide reactions or sensitivity need care?
Seek care for burning, white or peeling gum tissue, tooth sensitivity, pain, or discoloration that does not improve. A dentist can distinguish surface stain from enamel defects, fluorosis, decay, or a non-vital tooth.
Is the colour change on the surface or within the tooth?
Ask whether the colour is an external stain or a change within enamel or dentine. Ask which fluoride and whitening product is suitable and how to protect the gums and restorations.
Frequently asked questions
Does baking soda whiten teeth?
It can help remove some surface stain through gentle abrasion, but it does not bleach the deeper colour of enamel or dentine.
Can peroxide burn gums?
Peroxide can irritate or chemically injure gum tissue when the concentration, exposure, or fit of an application is unsuitable.
Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.