What to Avoid… – SMILES THROUGH CANCER

Dental Products and Ingredients to Avoid During Cancer Treatment

Some common oral care products contain harsh ingredients that can irritate your mouth or worsen side effects during chemotherapy or radiation. This page outlines which toothpastes, rinses, and other dental products to avoid—and why. Learn what to watch for on labels and discover safer alternatives that help soothe, not sting.

Avoid Harsh Toothpastes and Mouthwashes

Skip products with alcohol, which can dry out and irritate sensitive tissues

Avoid whitening or tartar control toothpastes, as they often contain strong abrasives

Steer clear of strong mint or cinnamon flavors that can burn or sting

Watch Out for Irritating Ingredients

Sodium lauryl sulfate (SLS) – a common foaming agent that can worsen mouth sores

Hydrogen peroxide – often found in whitening products, but too harsh during treatment

Triclosan – an antibacterial ingredient linked to irritation

Choose Gentle, Cancer-Safe Alternatives

Use alcohol-free, pH-balanced mouth rinses designed for dry mouth or sensitive mouths

Look for fluoride toothpaste with no SLS to protect enamel without triggering sores

Consider products labeled “for sensitive mouths” or recommended by your cancer care team