Insulin and Nutrient Partitioning
Insulin isn’t the enemy but the switch between storing and mobilizing fat: give it rhythm and the body can shift between fuels again.
Insulin[G] is not merely a blood-glucose hormone — it determines whether the body stores or mobilizes energy. The goal is not to “switch off” insulin[G] but to restore metabolic flexibility: the ability to shift between glucose and fat utilization. With chronically elevated insulin, this flexibility declines — fat mobilization becomes slower and less efficient. A stable meal rhythm, adequate protein and fiber intake, regular movement, and microbiota[G] support help normalize the insulin rhythm.
Insulin: the biological switch between storage and mobilization
Insulin[G] is one of your most important metabolic hormones. When you eat, it helps cells take up energy and signals that energy is available. This is completely normal. The problem is not the presence of insulin[G] but persistently elevated insulin levels, when the body receives a continuous storage signal.
In that state fat breakdown drops, cells receive less energy, and you become hungry sooner. Remember: this is not a matter of willpower. It is a biological response. Eating too often, fast carbohydrates, and a lack of movement all contribute.
Metabolic flexibility – how the body switches between fuels
A healthy body can switch between different fuels: glucose after meals, fatty acids between meals. Ketone production only becomes a meaningful fuel source during longer fasts or carbohydrate restriction (the time required varies by individual: sooner in someone with insulin resistance, later in someone with good insulin sensitivity[G]) — under a normal meal rhythm it is minimal. When this glucose–fat switch works, your energy level stays stable and hunger is more restrained.
In insulin resistance[G], this switch does not happen smoothly. Metabolic flexibility is a spectrum: in mild insulin resistance, fat oxidation is slower and less efficient rather than completely blocked. The body becomes “glucose-dependent,” which is why you can feel tired even while dieting. The goal, therefore, is not low carbohydrate intake on its own but gradual restoration of the insulin rhythm and metabolic flexibility.
Movement plays a direct role here. Zone-2[G] movement improves insulin sensitivity[G] and supports fat oxidation. Muscle is the body’s largest glucose-uptake organ — when you move regularly, cells access energy more easily, and the insulin response becomes more stable.
The composition of meals matters too. Protein and fiber slow absorption and provide a more stable insulin response. Ultra-processed foods cause larger swings. The goal is not for insulin to stay very low but for there to be periods when the body can mobilize its stores.
The microbiota[G] is also part of this regulation. The short-chain fatty acids produced from fermentable fibers — particularly butyrate[G] — reduce inflammation in the intestinal lining and improve gut-barrier integrity, which indirectly improves insulin sensitivity[G] [71]. In dysbiosis[G] this protective effect weakens, and insulin resistance[G] can intensify.
Don’t fear insulin – principles of sustainable metabolism
The clinical goal is not to eliminate insulin[G] but to restore flexibility. A stable daily routine, the right meal structure, daily movement, and microbiota[G] support work together. With these in place, the body can switch between storage and mobilization — and weight loss happens more naturally.
You don’t need to fear insulin. It is a necessary hormone. Your job is to build a lifestyle in which it works rhythmically. Once you have that, your body cooperates with you.
Summary of the 3-day goal: to understand that insulin[G] is not just a blood-glucose hormone but determines whether the body stores or mobilizes energy, and to establish the first stable, insulin-friendly daily meal structure.
- Lifestyle Journal updated with the hunger scale and meal times
- 3 main meals per day, no continuous snacking
- Breakfast contains at least 25 g of protein
- Daily fluid target of at least 1.7 liters (2×200 ml in the morning, at least 900 ml during the day, 2×200 ml in the evening)
- Eating window no more than 12 hours
- At least 6,200 steps/day
Why is weight loss difficult with chronically elevated insulin?
- The storage command: the presence of insulin[G] signals to the body that fuel is available, so fat mobilization slows down.
- Reduced metabolic flexibility: with chronically high insulin, the glucose–fat switch is slower and less efficient — this is a spectrum, not a complete shutdown, but it can cause fatigue even during dieting.
- The insulin[G] paradox: in insulin resistance[G] the body is full of calories (fat), but the cells receive too little energy, so the brain signals hunger.
- The role of muscle: muscle is the body’s largest organ for glucose uptake and utilization; movement (especially Zone-2[G]) improves insulin sensitivity[G] and supports oxidation of stored fat.
- Microbiota[G] and insulin sensitivity[G]: butyrate[G] produced from fermentable fibers reduces inflammation in the intestinal lining and improves gut-barrier integrity, which indirectly improves insulin sensitivity[G].
Pillars of treatment (3-day protocol):
- Insulin[G] breaks: 3 main meals per day provide the windows during which insulin is low enough for fat mobilization.
- Protein anchor: at least 25 g of protein at breakfast stabilizes blood glucose and prevents an insulin[G] roller-coaster during the day.
- Fiber shield: slows absorption, so the insulin response becomes more rhythmic and less spiky.
- Glycemic control through walking: a post-meal walk “burns” the glucose into the muscles, easing the load on the insulin system.
What do we measure?
- Hunger scale (1–5)
- CGM[G] curve, if available (optional — not every patient has access in the first week)
- Waist-to-hip ratio
- Step count (/day)
“Insulin[G] level is a signal for storage or mobilization. The rhythm matters more than the perfect diet. Stable insulin[G] → easier access to energy stores.”
- In the Lifestyle Journal, record the hunger scale (1–5) before each meal
- Meal times (breakfast–lunch–dinner: ±30 minutes)
- Observe snacking — don’t forbid it; note the time and how hungry you were beforehand (1–5)
- 10-minute walk after meals
- Mental task: when was I hungry shortly after a meal? — note 2–3 specific examples; we will come back to them tomorrow
- 3 main meals, no calorie intake in between
- High-protein breakfast with a fiber source
- Avoid late-night eating
- Step count at least 6,200/day
- Mental task: look at yesterday’s list — what do the early hunger episodes after meals have in common? (Was the eating window short? Did protein get missed? Was fiber low?)
- Eating window no more than 12 hours
- 10-minute walk after meals
- Fluid intake: at least 1.7 l
- Increase fiber intake in small steps (2–5 g/day)
- Mental task: when was no snacking needed — what was different about that meal? (Amount of protein? Fiber? Timing?)
- body weight;
- meal times and contents (B–D);
- post-meal walk (Y/N);
- daily protein intake (g);
- energy density[G] (0/+/++);
- NOVA[G] level;
- sleep quality (1–5);
- hunger scale (1–5);
- step count;
- bedtime / wake time (AC, AD);
- stool Bristol (1–7);
- bloating;
- daily stool count;
- fluid intake (l);
- UltraBiome dose;
- LOT identifier;
The goal of these 3 days is to stabilize the insulin rhythm, clarify hunger signaling, improve gut motility[G], and ensure the microbiota[G] receives the energy it needs.
References
[71] Hamer HM, Jonkers D, Venema K, Vanhoutvin S, Troost FJ, Brummer RJ. The role of butyrate on colonic function. Aliment Pharmacol Ther. 2008. Link
Narrative review summarizing the bioactivity of butyrate — a SCFA produced by colonic microbial fermentation of dietary fibre — and its mechanisms in human colonic function. Butyrate is the primary energy source for colonocytes and modulates inflammation, carcinogenesis, mucosal barrier integrity, oxidative stress, permeability, and satiety. The review consolidates evidence on butyrate as a central effector of colonic homeostasis and a target for dietary interventions in colonic disease.