Dr Rangan ChatterjeeThe Silent Belly Fat Trigger MOST Doctors Miss! | Dr. Pradip Jamandas
Dr. Rangan Chatterjee and Dr. Pradip Jamnadas on fasting lowers insulin, mobilizes fat, and improves cardiovascular markers.
In this episode of Dr Rangan Chatterjee, featuring Dr. Rangan Chatterjee and Dr. Pradip Jamnadas, The Silent Belly Fat Trigger MOST Doctors Miss! | Dr. Pradip Jamandas explores fasting lowers insulin, mobilizes fat, and improves cardiovascular markers The speakers argue that modern frequent eating keeps insulin chronically elevated, locking the body into calorie storage rather than fat-burning.
At a glance
WHAT IT’S REALLY ABOUT
Fasting lowers insulin, mobilizes fat, and improves cardiovascular markers
- The speakers argue that modern frequent eating keeps insulin chronically elevated, locking the body into calorie storage rather than fat-burning.
- They outline a metabolic progression during fasting—from using dietary glucose, to glycogen, to mobilizing fat and producing ketones for energy.
- Dr. Jamnadas describes finding that many cardiac patients with “normal” cholesterol and near-normal glucose still had exaggerated insulin responses, suggesting hidden insulin resistance.
- He links high insulin to atherosclerosis risk and to higher blood pressure via reduced nitric oxide–mediated vasodilation, reporting that fasting often allowed medication reduction in practice.
- Beyond weight loss, they report patient-noticed benefits during fasting such as improved mood, sleep, gut comfort, and reduced aches that correlate with lower inflammation markers (e.g., CRP).
IDEAS WORTH REMEMBERING
5 ideasFasting restores the body’s intended “store then burn” cycle.
They describe a sequence where the body uses meal-derived glucose first, then liver/muscle glycogen, and after ~18–20 hours begins mobilizing fat and producing ketones—an adaptive cycle frequent eating disrupts.
Chronically high insulin is framed as the upstream problem, not just high glucose.
The discussion emphasizes that frequent meals keep insulin elevated, promoting insulin resistance and requiring progressively higher insulin output to maintain near-normal blood sugars.
Normal cholesterol and “not diabetic” labs can still hide major metabolic risk.
Dr. Jamnadas reports seeing coronary disease in patients with acceptable cholesterol and only mildly abnormal glucose, later finding large insulin spikes on testing consistent with insulin resistance.
Insulin testing (not just glucose/A1C) is presented as an earlier warning signal.
Using the Kraft-style approach (glucose drink plus insulin measurements), he observed “massive” insulin responses even when glucose curves looked modest—suggesting years of hyperinsulinemia before overt diabetes.
Lowering insulin may improve blood pressure by restoring nitric oxide signaling.
He claims insulin acts as a vasoconstrictor by reducing nitric oxide availability; when insulin drops during fasting, vessels dilate more appropriately and blood pressure can fall significantly.
WORDS WORTH SAVING
5 quotesThe biochemistry of the body was made for feeding, fasting cycles, and this is the way the, the, uh, the, the bio- bioengineering of our body was, but we became dysfunctional because as food became more available, we just kept piling it on and on and on and on.
— Dr. Pradip Jamnadas
This high insulin is the problem. We've hormonally changed because we're eating too frequently.
— Dr. Pradip Jamnadas
Well, guess what? It's too late. You already have all the hardening of the arteries. You've done so much damage to your arteries, you probably did it for 15 to 20 years.
— Dr. Pradip Jamnadas
Because when you don't eat, guess what? You don't make insulin. That's it.
— Dr. Pradip Jamnadas
This advice that we gave patients previously, that, "Hey, cut your calories down by eating four small meals a day or nibble throughout the daytotally wrong in clinical experience."
— Dr. Pradip Jamnadas
QUESTIONS ANSWERED IN THIS EPISODE
5 questionsIn your clinical experience, what fasting schedule (e.g., 16:8 vs 24–48 hours) most reliably lowers insulin without harming adherence?
The speakers argue that modern frequent eating keeps insulin chronically elevated, locking the body into calorie storage rather than fat-burning.
What specific insulin measurements do you use in practice—fasting insulin, post-challenge insulin curves, or a full Kraft test—and what cutoffs signal concern?
They outline a metabolic progression during fasting—from using dietary glucose, to glycogen, to mobilizing fat and producing ketones for energy.
How do you separate the effects of fasting itself from changes in diet quality when patients break the fast (e.g., reduced ultraprocessed foods)?
Dr. Jamnadas describes finding that many cardiac patients with “normal” cholesterol and near-normal glucose still had exaggerated insulin responses, suggesting hidden insulin resistance.
What is the strongest evidence that hyperinsulinemia independently drives atherosclerosis when glucose and cholesterol are “normal,” and what evidence challenges that view?
He links high insulin to atherosclerosis risk and to higher blood pressure via reduced nitric oxide–mediated vasodilation, reporting that fasting often allowed medication reduction in practice.
For patients on antihypertensives or diabetes medications, what safety steps and monitoring are essential before attempting longer fasts?
Beyond weight loss, they report patient-noticed benefits during fasting such as improved mood, sleep, gut comfort, and reduced aches that correlate with lower inflammation markers (e.g., CRP).
Chapter Breakdown
How fasting switches the body from storage to fuel use
Jamnadas explains fasting as a return to the body’s intended “feeding–fasting” cycle. The key idea is that frequent eating keeps the body stuck in storage mode, whereas fasting forces it to use stored energy.
The timeline: glucose → glycogen → fat (ketones)
He lays out a simple sequence of what fuels the body uses as hours pass without food. Once glucose and glycogen are depleted, the body transitions to fat burning and ketone production.
Why insulin is the central issue (and why frequent eating breaks the system)
The conversation centers on insulin as the main hormonal driver of fat storage and metabolic dysfunction. Constant eating keeps insulin elevated, preventing fat breakdown and promoting insulin resistance.
From cardiology clinic to root cause: heart disease with ‘normal’ labs
Jamnadas describes noticing patients with heart disease despite acceptable cholesterol, blood pressure, and no diagnosed diabetes. This clinical puzzle prompted him to look beyond standard markers.
Catching early dysfunction: mild glucose intolerance and metformin resistance
He began testing for subtle glucose abnormalities and found many had impaired glucose control. Treating earlier (e.g., with metformin) was controversial but seemed to improve outcomes.
The Kraft test revelation: massive insulin spikes even when glucose looks fine
By measuring insulin response (not just glucose), he found many patients produced extremely high insulin after a glucose load. This highlighted hyperinsulinemia as a hidden problem preceding diabetes.
‘By the time you’re diabetic, it’s too late’: the long lead-in to damage
He argues that vascular injury can accumulate for 15–20 years before diabetes is diagnosed by common criteria (A1C, fasting glucose). The damage occurs during years of compensatory high insulin.
Why fasting became his main tool to lower insulin
Jamnadas frames fasting as the most direct way to reduce insulin because insulin production drops when you stop eating. With lower insulin, the next meal requires less insulin due to improved sensitivity.
Insulin, nitric oxide, and blood pressure: rethinking ‘essential hypertension’
He links high insulin to higher blood pressure through reduced nitric oxide and vasoconstriction. Fasting, by lowering insulin, improved vasodilation and led to substantial blood pressure drops.
Fat loss mechanics: lowering insulin unlocks stored fat
He reiterates insulin’s role as a storage hormone and describes fat loss as removing the ‘padlocks’ on fat stores. In his observation, fasting produced more favorable body composition/appearance than frequent low-calorie meals.
Unexpected patient benefits: mood, sleep, and brain effects (BDNF)
Patients reported feeling happier, more energetic, and sleeping better while fasting. He attributes some of this to fasting-related neurochemistry such as increased BDNF, which may enhance alertness and brain resilience.
Inflammation and physical comfort: joint pain, CRP, and gut symptoms
He notes improvements in aches, pains, and digestive symptoms that seemed disproportionate to the amount of weight lost. Objective inflammation markers (CRP) also improved in his fasting patients.
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