672: Toothpaste | Skeptical Sunday

Fluoride Benefits

Fluoride is a common ingredient in toothpaste and tap water, known for its dental health benefits. David C. Smalley explains that fluoride strengthens teeth and reduces cavities, which is why over 70% of U.S. tap water contains it 1. However, excessive fluoride can lead to health issues such as skeletal fluorosis and enamel damage, especially in children 1. Jordan Harbinger humorously notes the irony of fluoride causing white spots on teeth while aiming to whiten them 1.

   

Health Risks

Excessive fluoride intake poses significant health risks. David C. Smalley highlights that high fluoride levels can cause skeletal fluorosis, white spots on teeth, and even certain cancers 1. He also mentions a study showing adverse pregnancy outcomes from excess fluoride exposure 1. Additionally, David discusses the dangers of triclosan, an antibacterial ingredient once used in Colgate toothpaste, which was later removed due to health concerns 2.

   

Regulatory Oversight

The regulation of fluoride in dental products and drinking water is inconsistent. David C. Smalley explains that while the 1974 Safe Drinking Water Act gave regulatory oversight to the EPA, the decision to fluoridate water is left to state and local municipalities 1. This lack of federal regulation leads to varying fluoride levels across regions. Additionally, toothpaste manufacturers often list fluoride as a cosmetic ingredient, allowing them to bypass full ingredient disclosure 3.