27: It’s Not Just the pH - The Shocking Way Acid Type Changes Enamel Damage with Dr. Rob Karlinsey

What if the real risk to your enamel isn’t just how acidic a drink is, but the specific acids hidden inside it that change how your teeth dissolve?

In this episode of Dental Formulator’s Playbook, Dr. Rob and Tami break down how acidic drinks impact enamel demineralization, and why the “type of acid” matters, not just pH. They start with a surprising discussion on Pedialyte, explaining how a low pH plus citric acid and citrate salts can raise erosion risk, especially when calcium is absent. Then they compare major sodas and flavored waters, highlighting how acids like phosphoric acid, citric acid, and benzoic acid show up across brands for both preservation and taste. The episode closes with practical ways to reduce damage, plus a few “safer” sparkling water picks based on pH.

Highlights

1. Why pH below 5.5 increases demineralization risk (and how fluoride changes resistance)
2. The surprising enamel risk with Pedialyte (especially without calcium)
3. Coke vs. Pepsi: acid profiles and why “cola acid” is not always the same
4. Why benzoic acid shows up in drinks for more than preservation
5. A practical enamel-saving approach for acidic drinks when you are sick, dehydrated, or dry-mouthed
6. Flavored waters: why “it’s just water” can still be a problem
7. Which sparkling waters land closer to “gentler” pH territory

Practical Takeaways

1. Avoid brushing immediately after acidic drinks. Wait at least 30 minutes.
2. If you must use acidic electrolyte drinks, consider damage control strategies discussed in the episode (timing, fluoride support, and calcium buffers).
3. Flavored waters often contain citric acid and may sit below enamel-safe pH ranges.
4. Plain sparkling waters can vary. Some test closer to the safer side, but citrus flavors tend to drop pH.

📲 Connect with Dr. Rob (Robert L. Karlinsey, PhD)

🌐 Website: customdentalformulations.com

Robert L. Karlinsey, PhD

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