Chasing Life Podcast Episode: "Does Your 'Filtered' Water Still Have Fluoride?"

Release Date: June 10, 2025

In this informative episode of CNN's "Chasing Life," host Dr. Sanjay Gupta addresses pressing health concerns about fluoride in drinking water and its alternatives. Additionally, he explores the best dietary practices to maintain cognitive health as we age, providing listeners with actionable insights to enhance their well-being.

1. Understanding Fluoride in Filtered Water

Listener's Question: Paula from West Springfield, Massachusetts, asks whether the filtered water from her refrigerator removes fluoride.

Dr. Sanjay Gupta's Response: "Most water filters are not going to remove fluoride." (01:26)

Dr. Gupta explains that fluoride, being a dissolved mineral, is notoriously difficult to eliminate with standard water filters. However, he highlights two effective methods:

• Reverse Osmosis Filters: These systems force water through a semi-permeable membrane, removing approximately 80-90% of fluoride.

• Distillation Filters: By boiling water and capturing the steam, distillation effectively removes nearly 100% of fluoride.

He reassures listeners by stating, "For most people living in the United States, this is not a concern." (02:50) Dr. Gupta emphasizes that fluoride levels in U.S. water supplies are typically within safe limits and encourages listeners to verify their local fluoride levels through consumer confidence reports or the CDC's website.

2. The Role of Fluoride in Dental Health

Listener's Question: Lucia from New York inquires if using fluoridated toothpaste or mouthwash is sufficient for dental protection, especially if fluoride is removed from drinking water.

Dr. Sanjay Gupta's Response: "Fluoridated toothpaste or rinses are really effective at protecting teeth." (03:38)

Dr. Gupta acknowledges the historical significance of water fluoridation as a major public health achievement that has significantly reduced dental cavities. However, he notes a decline in its incremental benefits since the advent of fluoridated toothpaste and improved dental care access.

Key Points:

• Proper Usage: For children under three, a rice-grain-sized amount of toothpaste is recommended, while adults should use a pea-sized amount.

• Brushing Technique: Allowing fluoride to remain on the teeth without rinsing for 10-15 minutes enhances remineralization.

Dr. Gupta warns about potential consequences of removing fluoride from water: "There have been some modeling studies... if you remove fluoride from the water, it would lead to about 25 million excess cavities over the next five years." (05:15) He underscores the importance of balancing fluoride sources to maintain dental health.

3. Nourishing the Brain: Best Foods for Cognitive Health

Listener's Question: Sam from Norwalk, Connecticut, seeks advice on the best foods to enhance brain health, memory, and cognitive functions.

Dr. Sanjay Gupta's Response: "There is some solid science behind certain foods that support memory and cognition." (08:15)

Dr. Gupta references insights from Dr. Uma Naidu, a nutritional psychiatrist, highlighting key dietary components that bolster brain health.

Dr. Uma Naidu's Recommendations:

• Omega-3 Fatty Acids: Found in oily fish like salmon, tuna, and mackerel, essential for brain protection.

• Olive Oil: Rich in healthy fats that support cognitive functions.

• Herbs and Spices: Turmeric (with black pepper for enhanced absorption), cinnamon, saffron, rosemary, ginger, and sage have been shown to improve memory and thinking skills.

• Caffeine in Moderation: Helps with focus and memory when consumed responsibly.

Additional Insights from Dr. Gupta:

• Blueberries and Leafy Greens: Studies indicate that regular consumption can slow cognitive decline. Specifically, "Just a handful of blueberries or a single serving of spinach or kale can slow cognitive decline by years even." (10:27)

• Eggs: Packed with choline, a nutrient vital for memory and learning.

• Balanced Meals: Combining these ingredients into tasty meals ensures that nutrients are bioavailable and effectively utilized by the body.

Dr. Gupta emphasizes the importance of integrating these foods into daily meals to maintain and enhance brain health over time.

4. Conclusion and Final Thoughts

Dr. Gupta wraps up the episode by encouraging listeners to stay informed and proactive about their health choices. He invites further questions and interactions through various channels, reinforcing the podcast's commitment to providing reliable health information.

"If there's something health related you've been wondering about, you can record a voice memo, email it to asksanjayn.com or give us a call." (12:15)

Production Credits: Chasing Life is produced by CNN Audio with a dedicated team including Aaron Mathewson, Jennifer Lai, Grace Walker, and others, ensuring high-quality and informative content for its audience.

This episode of "Chasing Life" offers valuable insights into managing fluoride intake and emphasizes the significance of a brain-healthy diet. Whether you're concerned about your drinking water or looking to enhance your cognitive functions, Dr. Gupta provides evidence-based advice to help you lead a healthier, more informed life.