Is there a connection between toothpaste and cancer?

From a time when we used 'umikkari' (activated charcoal) and mango leaves to clean our teeth, we have come a long way. Toothpastes that focus on different issues, such as stain removal, sensitivity, gum health, cavity prevention, and more, are widely available in the market. Similarly, there are many different flavours and colours too. However, a while ago, a social media message stating that toothpastes containing Sodium Lauryl Sulfate (SLS) can cause cancer was widely circulated. One such message reached our fact-check helpline for verification. What's the truth behind the claim?

The viral message
The message we received stated:
'Your Toothpaste Could Be Harming Your Health. Every time you brush, synthetic chemicals in many commercial toothpastes aren’t just cleaning your teeth — they’re absorbed into your bloodstream within seconds. These ingredients reach beyond your mouth, affecting your entire body and potentially causing serious health issues over time. The harmful chemical found in toothpaste, Sodium Lauryl Sulfate (SLS), is known to irritate gums and skin and may trigger ulcers. It is linked to hormone disruption and even cancer risk. Be informed: Your toothpaste should be as safe as it is effective. Try natural alternatives for a true, toxin-free clean!"

What is SLS?
Sodium Lauryl Sulfate is a chemical widely used in cleaning and cosmetic products. It helps mix water and oils (or dirt). It is commonly derived from substances such as palm oil or coconut oil and is found in shampoos, soaps, and toothpastes. In toothpastes, it contributes to foam formation and cleaning efficiency. The US Food and Drug Administration (FDA) allows SLS in regulated amounts, particularly in personal care and cosmetic products. Reports indicate that restrictions are primarily due to digestive discomfort.

International health organisations, including the Occupational Safety and Health Administration (OSHA), the National Toxicology Program and the International Agency for Research on Cancer (IARC) under the World Health Organisation, have confirmed that Sodium Lauryl Sulfate is not carcinogenic (a factor that can cause or promote cancer). The above-mentioned reports confirm that toothpaste is not linked to oral cancer, and there is no scientific evidence that SLS causes cancer.

How we verified
To verify the matter, we consulted experts in oncology and dental health. They confirmed that claims linking SLS in toothpaste to cancer are entirely baseless. Regulatory agencies like the FDA and the European Commission have determined that using SLS in oral care products at controlled concentrations is safe. Experts advise regular brushing with fluoride toothpaste and good oral hygiene for healthy teeth. They also clarify that SLS in toothpaste serves as an effective antibacterial and antiviral agent.

Fact:
The claim that toothpastes containing Sodium Lauryl Sulfate cause cancer is false.