Struggling with energy crashes, brain fog, or "hangry" meltdowns after you eat? The tool Dr. Kumar and Dr. Berkowitz discuss in this episode, Clarity Blood Sugar, is built to help you figure out what is actually going on with your metabolic health and walk into your doctor's office prepared. Check it out here: https://bloodsugar.claritytx.ai

Most people have never heard of reactive hypoglycemia, and many physicians haven't either. But it may affect up to half the population, and it is one of the earliest warning signs on the road to prediabetes and diabetes.

In this episode, Dr. Ravi Kumar sits down with Dr. Keith Berkowitz, who worked alongside Dr. Robert Atkins in the late 1990s and became the torch bearer for that whole way of practicing medicine after Atkins passed away. Today Dr. Berkowitz runs the Center for Balanced Health in Manhattan, where he has spent thirty years treating the whole person instead of chasing a single number on a lab report.

Together they unpack what reactive hypoglycemia actually is, your blood sugar crashing in the first few hours after you eat, why it leaves you feeling worse instead of better, and how insulin resistance quietly builds for years before glucose ever looks abnormal. Along the way they trace the low-fat era back to its roots, the sugar industry's role in villainizing fat, the gut-brain connection, and why the tools to catch all of this early are finally here.

Episode Resources

• Dr. Keith Berkowitz, Center for Balanced Health
• Clarity Blood Sugar
• Dr. Ravi Kumar on LinkedIn
• Dr. Ravi Kumar's Website

In this episode, you will discover

• What reactive hypoglycemia is, and why up to 50 percent of people may have it without knowing
• Why you can feel more tired, foggy, or anxious after eating instead of energized
• The insulin resistance that shows up years, even decades, before glucose ever looks "high"
• Why it is cortisol, not the low blood sugar itself, that triggers the shakiness, sweating, and racing heart
• The everyday clues: vivid dreams, afternoon crashes, "hangry" spells, needing caffeine or sugar to focus
• How Dr. Berkowitz's own glucose tolerance test dropped him into the 40s, and what it revealed
• The Atkins story: standing against the low-fat craze, and why almost every warning proved right
• How the sugar industry helped villainize fat and eggs, and what the research actually showed
• Why digestion, the gut microbiome, and blood sugar are the two foundations of real health
• The simple, evidence-backed way to protect your microbiome when you have to take antibiotics
• Why the continuous glucose monitor has been a game changer for catching this early
• How Clarity Blood Sugar uses human-curated expertise plus AI to validate what you are feeling and build a real plan

Key Takeaways

Reactive hypoglycemia is essentially your blood sugar crashing within a few hours of eating, driven by an inappropriate surge of insulin, and it is one of the earliest predictors of prediabetes and diabetes. The symptoms most people write off, such as fatigue after meals, brain fog, anxiety, vivid dreams, and hangry crashes, are actually your body's cortisol response trying to pull your blood sugar back up. Insulin resistance can build for twenty years before glucose ever looks abnormal on a standard lab, which is why so much of this gets missed. Real metabolic health rests on two foundations: blood sugar and digestion. And the good news is that the biggest levers, including sleep, meal timing, exercise, and easing up on caffeine and alcohol, cost nothing and require no prescription.

About the Guest

Dr. Keith Berkowitz is the founder and Medical Director of the Center for Balanced Health in Midtown Manhattan, and a founding member of Clarity TX. He trained at Memorial Sloan Kettering and worked directly with Dr. Robert Atkins before carrying that integrative, root-cause philosophy forward into thirty years of his own practice. He sees patients remotely in New York, New Jersey, Florida, and California.

Disclaimer: This show is for informational purposes only and is not a substitute for medical advice. Everything shared here is meant to empower you to ask better questions and work with your own doctor. This show is completely separate from Dr. Kumar's role as assistant professor at UNC.