Episode Overview
Podcast: Neuroscience Meets Social and Emotional Learning
Host: Andrea Samadi
Guest: Dr. David Stevens, Clinical Psychologist, Neuropsychologist
Episode: The Glucose Protocol: How Fueling Your Brain Restores Clarity
Date: March 9, 2026
This episode explores the crucial yet misunderstood role of glucose as the brain’s primary fuel source, and how Dr. Stevens’ “Glucose Protocol” offers a paradigm shift for mental clarity, emotional regulation, and overall well-being. Building on his earlier research and introducing his new book, The Glucose Protocol, Dr. Stevens discusses how restoring brain glucose levels can resolve cognitive, emotional, and physiological symptoms—even debunking common myths about sugar, artificial sweeteners, and metabolic diseases like diabetes.
Key Discussion Points & Insights
1. Reviewing Key Concepts: Glucose vs. Sugar and Sweeteners
- Glucose vs. Fructose vs. Sucrose/Sucralose:
- Glucose: Primary fuel for the brain and body, a monosaccharide (C6H12O6).
- Fructose: Also a monosaccharide, primarily used to convert into fat.
- Sucrose/table sugar, artificial sweeteners (e.g., Sucralose/Splenda): Do not directly fuel the brain.
- Many people don’t distinguish between glucose and other sugars, which leads to confusion about sugar’s effects on health.
- “We carry our very own glucose production factory inside our body.” (Dr. Stevens, 07:45)
2. How Stress & Sympathetic Activation Depletes Brain Fuel
- Dr. Stevens explains that every activation of the sympathetic nervous system (fight/flight/freeze) reduces the efficiency of glucose transporters ("glutes") across the blood-brain barrier, resulting in symptoms like forgetfulness, poor concentration, anxiety, depression, and even headaches or immune disorders.
- “Every time we have a sympathetic nervous system activation, the ability for what are called glucose transporters... is lessened.” (Dr. Stevens, 08:56)
- Real-life example: Andrea describes loss of word processing under stress, confirming Dr. Stevens’ theory.
- “Your brain was prioritizing the glucose that it had to protection... There doesn’t leave enough fuel for something like processing words.” (Dr. Stevens, 12:08)
3. Glucose Protocol: Application and Immediate Strategies
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Dr. Stevens recommends pure dextrose (e.g., Smarties candy or powdered glucose) prior to stressful events to prevent cognitive lapses.
- “Anybody can have some Smarties candy with them. You can buy powdered dextrose and just mix up a glass of it.” (Dr. Stevens, 17:41)
-
Taking glucose right before a high-pressure task delivers immediate clarity by ensuring sufficient brain fuel, regardless of current stress.
“It’s such a paradigm shift... You’re talking to someone that’s almost sugar-phobia... but now I understand that glucose is different.”
—Andrea Samadi (18:18)
4. The Science: Storage and Transport of Brain Glucose
- Contrary to popular belief, the brain does store significant glucose in astrocytes—up to 30-40 tablespoons’ worth.
- Most literature underestimates this storage, leading to misunderstandings about refueling and brain function in fatigue or illness.
- “It’s not very well known, but the brain actually stores a lot of glucose... people have speculated the entire storage capacity... is about 300 to 400 grams.” (Dr. Stevens, 19:52–21:09)
5. Glucose, Autoimmunity, Diabetes, and HRV
- The brain regulates the immune system and blood sugar; chronic under-fueling or miscommunication (due to stress/trauma) triggers excessive immune activation, leading to inflammation, brain fog, and high blood sugar.
- “High blood sugar is almost always the result of an overactive immune system... It’s the fuel for the immune system as well.” (Dr. Stevens, 28:36)
- HRV (Heart Rate Variability) and other biomarkers track with brain fuel status.
- The brain, not the pancreas, ultimately regulates blood glucose by directing liver output and insulin activity. “Insulin resistance” is reframed as a strategic down-regulation of insulin by the brain to ensure glucose supply—not a simple metabolic defect.
6. Alzheimer’s, Dementia, and the Brain-Glucose Connection
- Dr. Stevens links diabetes and chronic under-fueling to increased risk of neurodegenerative diseases via impaired glucose transport and use in the brain.
- “It seems completely backwards that taking more sugar or glucose would help solve a high sugar problem, but it does... That’s the mechanism.” (Dr. Stevens, 35:12)
7. Glucose Delivery: From Tongue to Brain
- Glucose sensors on the tongue signal the brain, which redirects glucose-rich blood from the gut through the jugular vein directly to the brain—bypassing the standard digestive path and enabling rapid mental clarity.
- “As soon as any glucose touches our tongue... it redirects blood... through the jugular vein back to the brain...” (Dr. Stevens, 29:47)
8. Clarity Fuels – Accessible Brain Fuel
- Dr. Stevens is developing a practical, affordable glucose supplement (“Clarity” by Clarity Fuels) for on-the-go brain refueling.
- “You could take something called Clarity over just candy—it’s the paradigm shift.” (Andrea, 40:39)
9. The Four Pillars of Truth about Humanity
- Dr. Stevens closes with his philosophy on human worth and brain health:
- Every person is whole and complete.
- Every person is 100% acceptable, no matter what.
- Every person is infinitely worthy.
- Every person is completely safe—our brains are designed to restore function if given enough fuel.
- “Humans don’t need to be fixed, they need to be refueled.” (Dr. Stevens, 41:01)
- “As the brain has enough fuel, it will restore every part of your body.” (Dr. Stevens, 42:26)
10. Book & Research Validation
- Dr. Stevens’ new book, The Glucose Protocol, details the science behind the protocol, including case outcomes and a call for further research and randomized controlled trials.
- “I have worked with 1500–2000 people and achieved the outcomes I’m talking about... But this has the potential to be a landmark kind of top level medical discovery ever.” (Dr. Stevens, 45:37)
Notable Quotes & Memorable Moments
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On stress and brain clarity:
“It was like a presentation... I just ended up handing the person the brochure and said, ‘you can read this later.’... I was surprised at myself that I couldn’t read it.”
—Andrea Samadi, [11:31] -
On the paradigm shift:
“It seems completely backwards that taking more sugar or glucose would help solve a too high a sugar problem, but it does...”
—Dr. Stevens, [35:12] -
On the brain’s priorities:
“First and foremost is immediate survival... Second is longer term survival... Third, all the billions of different human functions... the brain will prioritize functions based on the needs of the moment.”
—Dr. Stevens, [13:01] -
On health and fuel:
“Humans don’t need to be fixed, they need to be refueled.”
—Dr. Stevens, [41:01] -
On faith and discovery:
“In October of 2017, I was awakened in the middle of the night... I call it divine inspiration: Try glucose. And that’s what got all this started.”
—Dr. Stevens, [46:50]
Timestamps for Key Segments
- Glucose vs. sugar & sweetener science explained: [04:35]–[08:30]
- Fight or flight and brain fuel breakdown: [08:56]–[12:08]
- Real-life stress example & brain prioritization: [10:30]–[14:33]
- Immediate cognitive rescue strategies: [16:26]–[18:49]
- Brain glucose storage science: [19:36]–[21:09]
- HRV, biomarkers, autoimmunity: [21:47]–[24:18]
- Diabetes, blood glucose regulation: [25:49]–[33:52]
- The direct glucose-to-brain pathway: [29:47]–[31:15]
- Clarity Fuels & practical tips: [39:44]–[40:39]
- Four Pillars & final philosophy: [41:01]–[42:26]
- Book/scientific credibility & faith in discovery: [45:16]–[47:07]
Takeaways & Practical Applications
- Understand the difference: Glucose is brain fuel; sucrose/artificial sweeteners are not.
- During stress: Have dextrose/glucose on hand (e.g., Smarties, powdered glucose, soon “Clarity”).
- For chronic issues: Many “mystery” symptoms (brain fog, low HRV, inflammation) may be due to under-fueled brains—reconsider root cause and try a brain-fueling approach.
- Holistic perspective: Nourishing the brain is a foundational—often ignored—element for restoring clarity, emotional stability, and physical well-being.
- Follow Dr. Stevens’ work: Book release, new company (Clarity Fuels), and ongoing research validation.
Connect & Learn More
- Dr. David Stevens:
- Offices in Colorado Springs; virtual consults worldwide
- Book: The Glucose Protocol (March 23, 2026; pre-order on Amazon)
- Forthcoming product: Clarity (by Clarity Fuels)
- Podcast and show notes: Links at www.AchieveIt360.com
This episode presents a potential paradigm shift in understanding brain health and holistic well-being. For anyone experiencing stress, cognitive fog, or metabolic confusion, Dr. Stevens’ protocol offers an intriguing, science-driven, and actionable answer: sometimes, all you need is the right kind of fuel.