White Birch Journal

White Birch toothpaste with white paste beside surface-stained and cutaway tooth models explaining extrinsic versus intrinsic stains.

Extrinsic vs. Intrinsic Tooth Stains: A Dentist Explains

Extrinsic vs intrinsic tooth stains: learn what whitening toothpaste can remove, what it cannot change, and when to see a dentist.

White Birch whitening toothpaste with white toothpaste and a tooth cross-section model illustrating toothpaste RDA.

What Is RDA in Toothpaste? A Dentist Explains

What is RDA in toothpaste? Dr. Andrew Frangella explains how Relative Dentin Abrasivity is tested, what the number means, what it cannot prove, and how to compare whitening formulas.

White Birch whitening toothpaste with white toothpaste, birch details and a clean Japanese-inspired bathroom setting.

Japanese Whitening Toothpaste: What to Look For

What makes a Japanese whitening toothpaste different? Dr. Andrew Frangella explains how to compare ingredient origin, stain removal, RDA, sensitivity, and Binchotan—plus where White Birch fits.

White Birch whitening toothpaste beside a cold glass of water and a toothbrush with white toothpaste for sensitive teeth.

Whitening Toothpaste for Sensitive Teeth: What to Look For

Can you use whitening toothpaste with sensitive teeth? Dr. Andrew Frangella explains RDA, peroxide, brushing pressure, desensitizing ingredients, and what to look for in a gentler daily formula.

White Birch whitening toothpaste with white calcium peroxide powder and white toothpaste in a clean dental formulation setting.

Calcium Peroxide Toothpaste: How It Whitens Teeth

Calcium peroxide is a solid whitening ingredient used in some toothpastes. Dr. Andrew Frangella explains how it works, how it differs from hydrogen peroxide and why the complete formula matters.

White Birch whitening toothpaste beside a cup of coffee and a toothbrush with white toothpaste, illustrating coffee stain removal.

Does Whitening Toothpaste Remove Coffee Stains? A Dentist Explains

Yes—whitening toothpaste can help remove coffee stains on the tooth surface. Dr. Andrew Frangella explains how it works, what it cannot change and how to whiten without aggressive brushing.

White Birch whitening toothpaste with birch elements and white toothpaste for an article about charcoal toothpaste and enamel safety.

Is Charcoal Toothpaste Safe for Enamel? A Dentist Explains

Charcoal toothpaste can vary dramatically in abrasivity. A dentist explains what determines enamel safety, what RDA means, and how White Birch’s signature ingredient is made from Japanese White Birch trees through the binchotan method.