The presenter introduces the 5-part series on water fluoridation.

• The series will explore the history, benefits, and safety of water fluoridation.
• The presenter shares a personal perspective on changing his mind about water fluoridation.

Vegetarian diets are associated with better dental health, possibly influenced by fluoride toothpaste usage.

• A meta-analysis shows vegetarians have fewer decayed, missing, and filled teeth.
• One study suggests that vegetarians who avoid fluoride toothpaste may have more cavities.

Fluoride toothpaste significantly reduces tooth decay and is essential for dental health.

• Fluoride improves the stability of dental enamel, protecting against decay.
• High-certainty evidence from a meta-analysis of controlled trials confirms the efficacy of fluoride toothpaste.

Water fluoridation is recognized as a safe and effective public health measure by global health authorities.

• The CDC and other public health entities endorse water fluoridation.
• Fluoridation is considered one of the 20th century's top public health achievements.

Water fluoridation faces opposition, with arguments against its necessity and potential health risks.

• Anti-fluoridation activists claim there's no dietary need for fluoride and question its efficacy and safety.
• The controversy over water fluoridation is detailed before delving into its history.

The history of water fluoridation is outlined from its accidental discovery to its widespread adoption.

• Fluoride's natural occurrence in water supplies led to legal rulings favoring fluoridation.
• Fluoridation began in Grand Rapids, Michigan, resulting in a significant decrease in cavity rates.

Water fluoridation varies globally, with some countries adding fluoride to drinking water, milk, or salt.

• Two dozen countries fluoridate their water, while others use alternative methods to distribute fluoride.
• The initial resistance to fluoridation in the US is contrasted with its current global practice.

Anti-fluoridation sentiment has persisted over time, exacerbated by misinformation on social media.

• Historical conspiracy theories and modern social media posts reflect the ongoing resistance to fluoridation.
• The prevalence of anti-fluoride content on social media platforms is highlighted.

The presenter discusses public trust in science and how it relates to the acceptance of water fluoridation.

• A worldwide survey shows low trust in science, but a follow-up survey indicates increased trust post-COVID.
• The efficacy of community water fluoridation in reducing cavities is affirmed.