Sharper Image Extra Strength Teeth Whitening Pen

Hydroxyapatite is a naturally occurring mineral that is the primary component of tooth enamel. It helps to remineralize and strengthen enamel, making it safe and beneficial for oral use.

Hydrogen peroxide is a common whitening agent that can cause enamel erosion and gum irritation, especially at high concentrations. In this product, it is likely present at a concentration above 6%, which raises safety concerns for oral use.

Xylitol is a natural sugar alcohol that helps to inhibit the growth of cavity-causing bacteria and promotes a fresh mouth feel. It is safe for oral use and can contribute to overall dental health.

Carbamide peroxide is a compound that breaks down into hydrogen peroxide and urea. While it can be effective for whitening, its safety profile depends on concentration and duration of exposure.

Propylene glycol is a synthetic compound that can cause irritation in some individuals. While it is generally recognized as safe in small amounts, its presence in oral products raises concerns about potential adverse effects.