Which foods are known to initiate remineralization of enamel when frequently used as between-meal snacks?

• A. Cheese & milk
• B. Candy bars
• C. Soda
• D. Chips

Answer: (A)

Remineralization happens when saliva supplies calcium and phosphate ions at a neutral to mildly alkaline pH, allowing minerals to redeposit into demineralized enamel. Foods that provide these minerals and help keep saliva buffering high between meals are especially helpful. Dairy products like cheese and milk fit this well: they deliver calcium and phosphate directly, contain casein that helps stabilize and deliver minerals to the tooth surface, and, particularly with hard cheese, stimulate saliva flow to boost buffering. This combination creates a mineral-rich, less acidic environment that supports rebuilding enamel after acid challenges that occur during meals and snacking.

By contrast, sugary or acidic snacks—such as candy bars, soda, and chips—tend to lower pH and promote acid production by bacteria, tipping the balance toward demineralization rather than remineralization.