There is a moment I have witnessed hundreds of times in my clinical practice — and it never gets old.
A patient comes to me exhausted. Mentally foggy. Carrying weight they haven’t been able to shift for years. Maybe they’ve tried every diet. Maybe they’ve been on Ozempic or another GLP-1 medication and lost water weight, then gained it all back. Maybe they’re in their 60s and starting to notice their memory isn’t what it was — that they lose words mid-sentence, that they feel like they’re thinking through gauze. Maybe they’ve been told by their regular doctor that everything looks normal on their labs, and they’ve started to wonder if this is just what getting older feels like.
They sit across from me and ask: “Is there actually something that can change this?”
My answer is yes. And the protocol that produces that change has a name: SKLeTT — which stands for Specific Ketone Level Titration Therapy.
This article is the most complete explanation of that protocol I have published anywhere. I’m going to tell you exactly what it is, how it was developed, why it works — mechanistically, not just empirically — and who it is and isn’t right for. By the end, you’ll have a thorough understanding of why this is not a diet, not a wellness program, and not another keto variation. It is a medical protocol, developed over more than two decades of clinical observation, with a precise biological target and a documented record of outcomes that continue to surprise even me.
How SKLeTT Was Born: A 25-Year Clinical Journey
The SKLeTT Protocol did not emerge from a research lab or a medical conference. It was built incrementally — year by year, patient by patient, failure by failure — in the clinical trenches of medical weight loss practice.
It began in the year 2000, when my father — a physician who had been administering medically supervised weight loss programs since 1976 — asked me to help him with his practice as he approached retirement. The program we were using was called Optifast 70 — a very low calorie formula providing 350 calories per day, with approximately 6 grams of carbohydrate per serving. Patients consumed five servings daily.
What I observed in those early years was remarkable. Men on this program were losing an average of 5 pounds per week. Women were losing approximately 3 pounds per week. These were not water weight fluctuations. This was consistent, sustained fat loss — and I was watching it happen in patient after patient, week after week.
More interestingly, patients who made it through the first week had approximately an 80% probability of losing more than 30 pounds — an extraordinary success rate for any weight loss intervention. And the patients who were losing weight consistently shared something beyond the numbers: a look in their eyes. Wide open. Alert. Present. Unmistakably different from the patients who were cheating, or plateauing, or losing nothing but water.
I didn’t understand what I was seeing yet. But I was watching it carefully.
Then the company that manufactured Optifast changed the formula. The new version — Optifast 800 — contained approximately 100 grams of carbohydrate per day. The results collapsed almost immediately. The patients on the new formula were not losing meaningful weight. They were not getting that look in their eyes. I argued with the company representative about this repeatedly. She wasn’t seeing the same thing at her clinic, she told me. Perhaps the patients in New York were different.
They weren’t. The carbohydrates were the variable. And that was the beginning of my understanding.
What “Specific Ketone Level Titration” Actually Means
The word titration comes from chemistry and pharmacology. When a physician titrates a medication, they are not simply giving a fixed dose — they are adjusting the dose precisely, monitoring the biological response, and calibrating to achieve a specific therapeutic target. We titrate blood pressure medications to achieve a target blood pressure. We titrate insulin to achieve a target glucose level.
The SKLeTT Protocol applies the same pharmacological precision to ketone production. The goal is not simply to “be in ketosis” in the vague, generic sense that the term is used in popular culture. The goal is to achieve and maintain a specific blood ketone level — measured as beta-hydroxybutyrate (BHB) — that falls within a therapeutic range where the clinical benefits actually materialize.
The measurement that matters most is pre-meal fasting BHB — the ketone level recorded in the morning before the first meal of the day, after the longest fasting period. This is the peak ketone level of the day and the most clinically meaningful number.
Based on more than two decades of monitoring patients, here is what I have observed at different ketone ranges:
| BHB Level (mmol/L) | What I Observe Clinically |
|---|---|
| Below 1.0 | Negligible ketogenic effect — essentially not in therapeutic ketosis |
| 1.0 – 2.0 | Early ketosis — some benefit, but cravings persist and fat loss is inconsistent |
| 2.0 – 3.9 | Meaningful ketosis — real benefits begin, but inconsistent for craving suppression |
| 4.0 – 6.0 | Therapeutic ketosis — cravings reliably suppressed, cognitive effects prominent, fat loss consistent |
| Above 6.0 | Deep therapeutic range — maximum clinical effects, reserved for specific cases |
My primary therapeutic target is a fasting BHB of 4.0 mmol/L or above. This is the level at which, consistently and reliably across hundreds of patients, I observe the full clinical picture: cravings essentially eliminated, mental clarity dramatically improved, sustained fat loss, and — critically — a level of BHB that patients can maintain long enough for the deeper neurological and metabolic changes to take root.
For elderly patients, achieving 4.0 mmol/L is more challenging and we work within a lower realistic range. For young, active patients who exercise regularly, I target between 5.0 and 6.0 mmol/L. I personally aim for 5.0 to 6.0 in my own practice of the protocol — because at that level, the cognitive effects are unmistakable.
What BHB Does: The Science in Plain Language
Before I explain the protocol’s components, you need to understand what beta-hydroxybutyrate actually does in the body — because it is not simply an alternative fuel. It is a signaling molecule that fundamentally restructures how the brain and body function.
“Most people think of ketones the way they think of a backup generator. When the main power goes out, the generator kicks on and keeps the lights running. That analogy is accurate but wildly incomplete. A closer analogy is that BHB is less like a backup generator and more like a facility upgrade. When BHB is consistently present at therapeutic levels, it doesn’t just keep the lights on. It rebuilds the electrical infrastructure of the entire building.”
— Dr. Barry Dublin, MD
Mitochondrial Biogenesis
BHB upregulates the genetic transcripts responsible for building new mitochondria — the energy-producing structures inside every cell. The brain consumes approximately 20% of the body’s total energy despite making up only 2% of its mass. More mitochondria means more available brain energy — not just during ketosis, but durably, as new cellular infrastructure is built.
BDNF Upregulation
BHB promotes the expression of Brain-Derived Neurotrophic Factor through inhibition of specific histone deacetylases (HDAC2 and HDAC3), activating the CREB signaling pathway. BDNF is the master regulator of neuroplasticity — the brain’s ability to form new connections, learn new behaviors, and adapt to challenges. In obese adults following a ketogenic diet, serum BDNF levels were significantly increased within the first two weeks.
Preferred Brain Fuel
PET imaging studies demonstrate that when ketones are available, the brain preferentially metabolizes them over glucose — they are literally “pushed” into brain tissue at a rate proportional to their blood concentration. For the aging brain struggling with insulin resistance, as I described in my article on Type 3 Diabetes, BHB bypasses the broken glucose pathway entirely.
NLRP3 Inflammasome Inhibition
BHB is one of the most potent known inhibitors of the NLRP3 inflammasome — the molecular trigger responsible for chronic neuroinflammation. This is the inflammatory pathway implicated in Alzheimer’s disease, depression, brain fog, and a wide range of chronic illnesses. Critically, this inhibition only occurs with endogenous BHB produced through true ketosis — not with exogenous ketone supplements consumed while still eating carbohydrates.
Cardiovascular Protection
BHB is a preferred fuel for the heart muscle and has been shown in research to improve cardiac contractility — the strength with which the heart pumps. Additionally, at high therapeutic levels, BHB promotes angiogenesis — the formation of new blood vessels — through epigenetic modulation of HIF-1α and VEGF pathways. I have observed this directly in a patient whose coronary artery angiogram revealed complete collateral vessel formation bypassing a total blockage — a patient who had been in sustained high-level ketosis for months.
The Patients Who Changed My Understanding
I want to share several clinical cases from my practice — with identifying details changed — because they illustrate the range of what therapeutic ketosis has produced in real human beings. These are not cherry-picked success stories from a conference presentation. They are cases that fundamentally shaped how I understand the protocol’s potential.
The woman who started crocheting again
A patient on the protocol mentioned in passing that she had a bin of crochet materials under her bed. For two years, she had walked past it every day saying “I’ll start tomorrow.” About a month into the protocol, she pulled the bin out and started crocheting — spontaneously, without planning to, without deciding to. She came to her next appointment wanting to understand why. I told her what I had been observing in many patients: low brain energy is why people stop doing the things they love. It isn’t laziness. It isn’t depression, in the simple sense. It is a brain running out of fuel. Give the brain the fuel it was designed to run on, and the person you used to be begins to come back.
The woman on oxygen who started sewing again
A severely obese patient with COPD who was on oxygen 24 hours a day struggled across town to see me because she wanted to lose weight. She had been a seamstress — the go-to person in her apartment building for alterations and projects. She had not sewn in ten years. Two months into the protocol, without any discussion of it, she simply began sewing again. People from her building started coming back to her apartment with projects.
The MS patient who walked again
A woman in her late 60s with multiple sclerosis who had suffered a stroke had been wheelchair-bound for five years and was unable to swallow liquids properly. She achieved and maintained BHB levels above 2.0 mmol/L consistently for six months under my supervision. At the three-month visit, I noticed she had repositioned herself — reclining on her side on the bed, using her arm for support, something she could not have done before. At the six-month visit, she was walking with a walker. Her speech was clearer. Her ability to swallow had dramatically improved. Her family was, in their words, shocked.
The 92-year-old man who woke up
Perhaps the most extraordinary case in my career. A man in his early 90s, discharged from hospital care with a PEG feeding tube and a prognosis of weeks to live, non-verbal, non-reactive, diagnosed with cardiogenic dementia from end-stage heart failure. I modified his tube feedings to very low-carbohydrate formulas with aggressive hydration, achieving ketosis through his feeding tube. At my third monthly visit, I opened the apartment door expecting to find him unresponsive in bed. Instead, he was sitting on the edge of the bed, feet dangling, back to me — and when he heard the door, he turned around and shouted: “Doc, when are you going to let my wife give me pancakes for breakfast?” He was fully alert, knew the date, the time, his location. He began walking with assistance. He came off his heart failure medication, his diabetic medication, and his kidney function began to recover. He lived another year and a half.
I share these cases not as proof of cure — I want to be careful and responsible with that language — but as illustrations of a biological truth that I believe is profoundly underappreciated in mainstream medicine: when you restore the brain’s fuel supply, you restore the person.
The Psychology of Starting — and Why Most People Don’t
I have a document available on my website — a clinical and psychological essay called “The Chains We Choose” — that goes deeply into something I have observed over and over in 30 years of practice. You can download it as a companion to this article by entering your email on the NeuraLift homepage, and I strongly encourage you to read it.
Here is the essence of what it addresses: knowing is not doing. The gap between understanding that something would help you and actually doing it is one of the most well-documented and least-discussed problems in all of medicine.
I have sat with patients — homebound, oxygen-dependent, facing amputation — and spent 45 minutes explaining the protocol in detail. Their eyes light up. They ask questions. They say “I want to start.” Two weeks later, they haven’t ordered the supplies. Four weeks later, the conversation has quietly died. Eight weeks later, they have rationalized their inaction into something that sounds almost reasonable.
This is not weakness. It is the architecture of the human brain. The brain is wired with what behavioral economists call present bias — the neurological tendency to prioritize the immediate comfort of today over the far greater benefits of three months from now. Combined with status quo bias, learned helplessness, and the sheer psychological weight of changing an identity built around being a sick or tired person — the obstacles to starting are not motivational. They are neurobiological.
“And here is the profound irony at the center of this problem: the very brain energy deficit that makes the protocol necessary is also what makes it hardest to start. A brain running on depleted fuel cannot generate the motivational drive, the executive function, or the neuroplasticity needed to initiate and sustain a new behavior. You cannot build new neural architecture on an empty energy substrate.”
— Dr. Barry Dublin, MD
This is why I tell patients something that initially surprises them: “The hardest part of this protocol is the first ten days. After that, the biology starts working for you, not against you.”
Once BHB reaches therapeutic levels, the nucleus accumbens — the brain’s motivational center — begins generating the drive that makes action feel possible. The prefrontal cortex regains the executive function to override old habits. BDNF begins rebuilding synaptic connections. The person who couldn’t imagine finding the energy to change begins spontaneously pulling crocheting bins out from under the bed.
The protocol doesn’t motivate you to change. It gives your brain the energy to make change neurologically possible.
What Makes This Protocol Different From Regular Keto
I want to address this directly, because it is the question I am asked most frequently by patients who have tried a ketogenic diet before and feel they already know what this is. They don’t.
Here is what I observed in my weight loss clinic before I fully developed the SKLeTT Protocol: patients on a standard “keto diet” — 20 to 30 grams of carbohydrates per day, protein, salad, perhaps some berries — were almost universally not in ketosis. I tested them. Their BHB levels were near zero. They were losing water weight in the first week or two, plateauing, getting frustrated, and eventually bingeing and quitting. The cycle would repeat. The weight always came back, and it always came back quickly — because water weight returns quickly. Fat loss does not.
Vegetables contain enough carbohydrate to prevent ketosis in most people
This surprised even me when I first tested it systematically. Patients eating exclusively protein and salad were not going into meaningful ketosis. Even spinach — with negligible listed carbohydrates — was enough to trigger carbohydrate signaling in some patients.
The transition period is brutal and unsupported
The first three to five days of true zero-carbohydrate eating are among the hardest things I have asked patients to do. Glycogen stores last approximately two to three days. When they are exhausted, the body enters a brief metabolic no-man’s-land. Most people never push through this phase. The SKLeTT Protocol has a structured approach to this transition that significantly improves the experience and success rate.
Most ketogenic diets don’t account for chemical interference
Through years of testing, I discovered that a surprising range of substances inhibit the ability to enter ketosis — not just carbohydrates. The protocol has specific rules governing what is and isn’t compatible with achieving therapeutic ketone levels.
Electrolytes and hydration are critical and usually ignored
The “keto flu” — the headaches, fatigue, dizziness, and muscle cramps that drive many people to quit in the first week — is almost entirely an electrolyte and hydration problem, not an inevitable consequence of carbohydrate restriction. The SKLeTT Protocol includes a strict hydration and electrolyte protocol that prevents keto flu almost entirely in patients who follow it precisely.
The Six Components of SKLeTT
The acronym SKLeTT stands for: Specific Ketone Level Titration Therapy. But the protocol itself encompasses six integrated components — because achieving and sustaining therapeutic ketosis requires supporting the biology from multiple angles simultaneously.
Sleep
During deep sleep, the brain undergoes active metabolic restoration — clearing inflammatory waste products via the glymphatic system, consolidating memory, and regenerating neural architecture. Sleep deprivation raises cortisol, increases insulin resistance, and makes achieving therapeutic ketosis significantly harder. Research demonstrates that ketogenic diets enhance REM sleep — the sleep stage most critical for memory consolidation and emotional regulation.
Ketosis
The core of the protocol — achieving and maintaining fasting BHB at the therapeutic target range through a precisely structured dietary approach, including a liquid phase that makes the critical first two weeks manageable, a hydration protocol that prevents keto flu, and a supplement strategy that supports nutritional completeness without interfering with ketogenesis. The specific details of this phase are proprietary to the clinical program — not because I want to withhold information, but because implementing it without physician supervision carries real risks.
Light
Morning light exposure within 30 minutes of waking calibrates the circadian clock, which regulates cortisol patterns, sleep timing, insulin sensitivity, and metabolic rate. Evening light avoidance — specifically blue-spectrum light from screens — protects melatonin production and sleep architecture. The light component integrates both morning exposure protocols and evening light management into the daily routine.
Exercise
Exercise in the SKLeTT Protocol is prescribed not primarily to burn calories but to maintain the elevated brain energy baseline that prevents stress eating and makes weight maintenance neurologically durable. Patients new to exercise begin with as few as 3 to 5 minutes of gentle cardiovascular activity daily, increasing by 5 minutes per week until reaching one hour. The goal is to build the habit and the neurological infrastructure, not to exhaust patients before they’ve stabilized metabolically.
Time
Time-restricted eating — often called intermittent fasting — is integrated into the protocol because it powerfully reinforces ketone production, improves insulin sensitivity, supports circadian rhythm, and extends the daily fasting window during which BHB is produced and available. The specific timing parameters are calibrated individually based on patient age, activity level, and ketone response.
Targeted Supplementation
The supplement component is carefully curated — not a general wellness stack, but a specific set of evidence-based nutrients chosen for their documented effects on brain health, mitochondrial function, and metabolic support. Equally important: the supplements must be verified to not interfere with ketogenesis, which eliminates many popular supplements on the market. The specific recommendations are individualized within the clinical program.
Who Is SKLeTT For?
Let me be direct about this, because I believe in honest medicine over marketing.
The SKLeTT Protocol is best suited for:
- •Adults in their 40s, 50s, 60s, and beyond who are experiencing brain fog, mental fatigue, declining memory, or word-finding difficulty
- •People who have tried GLP-1 medications (Ozempic, Mounjaro) and lost primarily water weight, then regained it
- •People who have tried a ketogenic diet but never achieved meaningful ketosis or sustained results
- •Patients with early signs of cognitive decline who want to address the metabolic root causes before symptoms progress
- •Individuals with insulin resistance, pre-diabetes, or Type 2 diabetes who want to address brain health alongside metabolic health
- •Anyone with a family history of Alzheimer’s disease who wants to reduce their risk through metabolic intervention
The protocol requires physician supervision if you:
- •Are on any prescription medications (many interact with ketosis in ways that require monitoring)
- •Have a history of kidney disease, liver disease, or cardiac arrhythmias
- •Are over 65, particularly with multiple comorbidities
- •Have a history of eating disorders
The protocol is not designed for people who are unwilling to follow it precisely. I say this not as a judgment but as a clinical reality. The strictness of the protocol is not arbitrary — it reflects 25 years of testing and refining what actually produces therapeutic ketone levels, as opposed to what merely produces the appearance of effort.
Why “Titration” Is the Most Important Word in the Name
Most people who try keto diets do not own a blood ketone meter. They have no idea whether they are at 0.2 mmol/L or 4.5 mmol/L. They have no idea whether the handful of almonds they allowed themselves knocked them out of ketosis. They have no way of knowing whether they are in the metabolic state that produces the benefits they are seeking.
The SKLeTT Protocol begins with a blood ketone meter — a device about the size of a glucose meter that gives an accurate BHB reading in seconds from a fingerstick. Patients log their readings. I review them. Together, we titrate — adjusting the protocol until the therapeutic target is reliably achieved. When the number drops, we identify why and correct it. When the number rises into the therapeutic range and holds there, we know the biology is working.
This is what separates physician-guided therapeutic ketosis from every do-it-yourself approach on the market: a measurable biological endpoint, monitored continuously, and adjusted with clinical expertise.
My Clinical Observation After 25 Years
I have watched patients who were homebound, oxygen-dependent, cognitively diminished, physically disabled — patients who had been told that their condition was their new normal — regain function, clarity, and quality of life through this protocol. I have also watched patients with none of those problems — busy, intelligent, successful people — transform their mental performance in ways they described as having their lives back.
I am not suggesting that every patient achieves every outcome. Medicine is not magic, and I will not make claims that exceed what I have observed. But I will say this with full conviction: there is no pharmaceutical drug, no supplement stack, no dietary intervention I have encountered in more than 30 years of clinical medicine that produces the range of effects I have witnessed with sustained, physician-titrated therapeutic ketosis.
The reason is not mysterious. The brain is an energy organ. When that organ runs out of its preferred fuel and cannot properly access its backup — when it is caught in the metabolic crisis I described in my article on Type 3 Diabetes — it cannot function as designed. When you restore the fuel supply at the cellular level, through a protocol precise enough to actually achieve and maintain therapeutic ketone concentrations, the brain begins doing what it was built to do.
That, in essence, is what SKLeTT is. Not a diet. Not a shortcut. A precise, physician-guided restoration of the metabolic conditions under which the human brain performs at its best.
Is the SKLeTT Protocol Right for You?
If you would like to understand whether the SKLeTT Protocol is the right fit for your situation, I invite you to book a free discovery call. We’ll talk about your health history, your goals, and whether this is the right time and approach for you.
Also available: Download “The Chains We Choose” — Dr. Dublin’s clinical essay on the psychology of starting (enter your email on the homepage)
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Dr. Barry Dublin, MD
Physician specializing in metabolic medicine and therapeutic ketosis. Creator of the SKLeTT Protocol — Specific Ketone Level Titration Therapy — and founder of NeuraLift. Over 30 years of clinical experience in brain energy optimization.