In this episode of The Diary Of A CEO with Steven Bartlett, Annette Bosworth explains how chronically elevated insulin drives aging, disease, and metabolic dysfunction. She identifies visible warning signs of insulin resistance—including skin tags, darkened skin patches, abdominal fat, and hair loss on the lower legs—and connects persistent high insulin to conditions ranging from cancer and Alzheimer's to depression and brain fog.
Bosworth presents practical strategies for lowering insulin and improving metabolic health, emphasizing that meal timing becomes increasingly important with age. She introduces the Ketone Continuum, a twelve-stage framework that guides individuals toward sustained ketone production through dietary changes and extended fasting. The episode also addresses how women's bodies respond differently to ketogenic nutrition and fasting, and explains how regulating insulin can restore hormonal balance and metabolic flexibility across different life stages.

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Annette Bosworth explains that [restricted term]'s primary job is moving glucose into cells for energy, but when abundant, it stores excess glucose as fat and stimulates growth throughout the body. Chronically high [restricted term] causes inflammation and cellular debris accumulation, accelerating aging and disease onset. Bosworth links persistently elevated [restricted term] to a wide range of health issues including cancer, high blood pressure, Alzheimer's, Parkinson's, depression, and brain fog.
Visible signs of chronic high [restricted term] include abdominal fat accumulation, skin tags that appear like "baby cauliflower" in body folds, acanthosis nigricans (darkened, velvety skin often mistaken for dirt), and hair loss on the lower extremities. These indicators reflect long-term metabolic dysfunction and tend to disappear when [restricted term] levels are lowered.
Modern eating patterns drive excessive [restricted term] production through processed foods dense in carbohydrates, frequent snacking, and eating large meals late at night. This prevents the natural overnight decline in [restricted term], resulting in morning inflammation and creating a cycle of chronic hyperinsulinemia that accelerates aging and increases disease risk.
Bosworth emphasizes that meal timing becomes increasingly crucial with age. For someone at 54, she explains that calories consumed after 6 p.m. have a tenfold greater impact than those eaten before noon—meaning the body utilizes morning food far more efficiently. Late-night eating spikes [restricted term], which can remain elevated through the night and into morning even after eight hours of fasting, especially following carb-heavy meals. Consuming meals earlier aligns with circadian rhythms, favoring fat burning, optimal energy use, and improved longevity.
Bosworth identifies a common problem with time-restricted eating: delaying meals until late in the day creates a "balloon" of evening calories that overstimulates [restricted term] production. Even extended fasting periods don't normalize [restricted term] if the last meal was large and carb-rich. While some feel focused during fasting, this doesn't confirm optimal metabolic health. The key recommendation is to "move that food towards morning" to support metabolic health and curb inflammation.
The Ketone Continuum is a twelve-stage system guiding individuals from high [restricted term] and frequent eating toward sustained ketone production and metabolic flexibility through gradual dietary changes, extended fasting, and careful monitoring.
The beginner phase starts with stage one's baseline of eating every two to three hours without carb restriction. Stage two cuts daily carbs to 20 grams—the only number to track initially—leading to ketone production within a week. Stage three establishes consistent ketone production and hormone recovery, creating natural appetite suppression. Stage four prepares individuals for intermediate phases with time-restricted eating as meals become easier to skip.
Stage five introduces 16:8 time-restricted eating, with 16 hours of fasting and an 8-hour eating window. For late-day eaters, fat-forward, calorie-dense foods support fat mobilization during eating periods. The Continuum gradually tightens the eating window beyond 16:8, moving toward 23:1 fasting patterns while shifting eating periods earlier in the day for optimal results.
For individuals with 15-20 years of high [restricted term], a 36-hour fast may be necessary to reset pancreatic function. Prolonged fasting of 36-72 hours lowers [restricted term], burns fat, clears cellular debris, and recalibrates pancreatic health. The framework asserts that despite claims against extended fasting for women or those over 50, individuals with severe [restricted term] resistance often require these interventions for metabolic recovery.
Bosworth explains that women's bodies are evolutionarily designed to retain fat for reproductive needs, meaning they mobilize fat more slowly than men under ketogenic diets or fasting. This slower transition to ketosis is normal metabolic dimorphism, not a disorder, and requires greater patience and sustained adherence.
Many women suffer from excessive [restricted term] production, manifesting as vitamin D deficiency, low estrogen, hair loss, PCOS, and skin tags. Bosworth stresses that critiques about keto harming female hormones are misplaced for [restricted term]-resistant women—regulating [restricted term] should be the primary concern. Once [restricted term] is controlled, ketogenic diets support rather than damage hormonal health, addressing foundational causes of hormonal imbalance and improving fertility and menstrual regularity.
Fat-based hormones like estrogen and vitamin D are often trapped in adipose tissue in obese women. Ketogenic nutrition lowers [restricted term], promoting fat mobilization and restoring hormonal signaling. Women frequently report more synchronized, regular menstrual cycles with reduced symptoms, as Bosworth notes their hormones can finally "hear each other" when [restricted term] stops disrupting metabolic traffic.
Long-term ketogenic practice fosters metabolic flexibility, particularly valuable for women optimizing brain and energy function across life stages. Bosworth, now in menopause, observes that without ketones her brain and energy suffer. With menopause intensifying [restricted term] resistance and declining estrogen, ketone production becomes vital for preserving cognition, mood, and vitality. The goal is building resilience and health through reproductive years, menopause, and beyond.
1-Page Summary
Annette Bosworth explains that [restricted term]'s primary job is to move glucose into cells for energy. When energy is abundant and there’s plenty of [restricted term], it directs any excess glucose to be stored as fat. [restricted term] essentially “insulates,” making the body fluffier by promoting fat storage. In abundance, [restricted term] does not just store energy for times of famine, but also stimulates growth—this includes making skin thicker and contributing to the appearance of skin tags.
When [restricted term] levels remain chronically high, it causes inflammation and the accumulation of cellular debris in the body, accelerating aging and the onset of chronic diseases. The inability to clear these byproducts hastens disease progression. Over time, persistently high [restricted term] is linked to a wide range of health issues including cancer, high blood pressure, Alzheimer’s disease, Parkinson’s disease, depression, and brain fog, evidencing its systemic impact on aging and wellness.
One of the first visible signs of chronic high [restricted term], or hyperinsulinemia, is the development of abdominal fat. Excess [restricted term] sends signals to store fat preferentially in the belly and torso.
Bosworth describes skin tags as another telltale sign—these are not moles, but small, mushroom-like protrusions with a narrow neck, usually forming in body folds where the skin rubs together, such as the armpits and groin. She likens their appearance to a crop of baby cauliflower. Skin tags are a direct result of prolonged elevated [restricted term] and tend to vanish when [restricted term] levels are lowered.
Another dermatological sign is acanthosis nigricans, seen as velvety, darkened, thickened skin. This often appears on the back of the neck, elbows, and body creases. Many think it’s dirt that won’t wash off, but in reality, it’s a manifestation of high [restricted term]. This condition is especially prevalent in teenagers experiencing both hormonal changes and hyperinsulinemia.
Hair loss in the lower extremities, especially the toes, also signals chronic high [restricted term] exposure. In older adults with long-standing high [restricted term], hair may disappear from the toes and progressively from the ankles up to the knees. This occurs because the body deprioritizes blood and nutrient supply to these regions as metabolic dysfunction worsens, causing the hair follicles to cease functioning.
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Insulin's Role in Aging, Disease, and Resistance Signs
Optimizing when you eat may be as crucial as what you eat, especially as you age. Shifting calories toward earlier in the day and aligning meals with your circadian rhythm enhances metabolic health and longevity, while delayed eating patterns can disrupt [restricted term] regulation and hasten disease.
Annette Bosworth underscores that with age, the timing of caloric intake becomes increasingly important. She explains that for someone who is 54, consuming calories in the morning has a dramatically greater benefit—“if you eat that one bite of food after six o’clock, it is worth 10 bites of food before noon.” This tenfold difference implies that the body’s ability to utilize energy from food is significantly enhanced when meals are consumed earlier, potentially reducing disease risk and maximizing nourishment.
Bosworth warns that eating late, specifically after 6 p.m., causes the body to produce excessive amounts of [restricted term]. If the last meal is substantial and rich in carbohydrates, the [restricted term] response lingers through the night and into the morning. Even after eight hours of fasting, [restricted term] may remain high, especially following a late, carb-heavy meal, preventing the body from reaching a healthy fasting state. Persistently elevated [restricted term] at night marks the beginning of chronic inflammation and accelerates aging.
Consuming meals earlier in the day aligns with circadian rhythms, which favor fat burning, optimal energy use, and improved longevity. Morning calories are metabolized more efficiently, and eating in sync with body clocks supports better glycemic control and long-term health outcomes.
Bosworth identifies a common tendency among those practicing intermittent or time-restricted eating: delaying meals until late in the day, often leading to a “balloon” of calories in the evening. This pattern overstimulates [restricted term] production, impairing the body’s metabolic flexibility and negating many benefits of fasting. Instead of maximizing health, late-day eating increases disease risk due to sustained high [restricted term].
Optimizing Metabolism Through Meal Timing and Eating Earlier
The Ketone Continuum is a structured, twelve-stage system designed to guide individuals from a state of high [restricted term] and frequent eating toward sustained ketone production, metabolic flexibility, and long-term health improvements. The framework emphasizes gradual adaptation through dietary changes, fasting strategies, and careful monitoring to ensure safe and effective progress.
The Continuum starts with frequent eating and higher carbohydrate intake, which forms the baseline for transformation. Progress is ensured through incremental steps that reduce carbohydrate consumption and extend fasting periods. The aim is to lower [restricted term] levels, boost ketone production, and train the body for metabolic flexibility. Each stage builds upon the previous, ensuring ketones are present in the blood and the individual continues to make metabolic progress.
Initially, the system acknowledges that most people begin with eating every two to three hours and without restricting carbohydrates. This starting point—often where individuals return after “falling off the wagon”—serves as the baseline for change.
From the baseline, the first dietary shift is cutting daily carbohydrates to 20 grams. This simple metric is the first focus for measurement. The reduction quickly leads to ketone production, which can be tracked with urine strips. As the body adjusts, fat-based hormones start to recover, resulting in the suppression of appetite and easier meal skipping. Over time, further dietary changes encourage the use of fat as the primary fuel source.
Following carbohydrate reduction, extended fasting becomes the next focus. Time-restricted eating is introduced, beginning with shorter fasting periods (such as 16 hours) and increasing steadily. This adaptation promotes further drops in [restricted term] and trains the body to rely on fat reserves by removing snacks and calorie intake from extended periods of the day.
The beginner phase consists of four key stages that help the body initiate ketone production and begin metabolic transformation.
Stage one reflects the starting point for most individuals: eating every two to three hours with no carb restriction. This baseline serves as the foundation for all subsequent changes.
Stage two involves dropping daily carbohydrate intake to 20 grams. This is the only number that must be tracked initially. Most people see the beginning of ketone production within a week and can verify this through ketone test strips.
In stage three, consistent ketone production is established. Hormones related to fat metabolism begin to recover, which often leads to a noticeable reduction in appetite. Many people find themselves naturally skipping meals at this point.
By stage four, natural appetite suppression sets the stage for more advanced strategies like time-restricted eating. Some individuals may skip meals effortlessly, paving the way for fasting protocols.
With an established baseline, the Continuum moves toward extending fasting windows through time-restricted eating practices.
Stage five adopts a 16:8 regimen, meaning 16 hours of fasting and an 8-hour eating window each day. Participants consume nothing—no calories or snacks—during the fasting period.
For those accustomed to eating late, the 16:8 approach is introduced gently, with a push to consume calorie-dense, fat-forward foods during eating periods. This is important because high [restricted term] states can “lock in” body fat, requiring dietary fat to ...
Ketone Continuum: A 12-step Framework For Sustaining Keto Nutrition
Annette Bosworth explains that women’s bodies are evolutionarily designed to retain fat, prioritizing reproductive needs and pregnancy demands. She notes, “the women, they do what your girlfriend does. It just holds onto them. That we are designed to have that fat on them.” Compared to men, this adaptation means women mobilize fat more slowly, particularly under ketogenic diets or fasting. Steven Bartlett observes that his girlfriend takes much longer than he does to enter a ketogenic state. Bosworth confirms that this slower transition is a reflection of normal metabolic dimorphism, not a failure or disorder. Women may experience delayed ketosis and fat loss on the same keto protocols as men, which requires greater patience and sustained adherence.
Bosworth highlights that many women, especially in childbearing years, suffer from excessive [restricted term] production, manifesting as vitamin D deficiency, low estrogen, hair loss, PCOS, and skin tags. These are all signs of elevated [restricted term] disrupting normal hormonal function. She stresses that critiques about ketogenic diets harming female hormones are misplaced for [restricted term]-resistant women—restoring normal [restricted term] levels should be the primary concern. Once [restricted term] is regulated, a ketogenic diet supports rather than damages female hormonal health. Bosworth emphasizes that [restricted term] dysfunction is often overlooked as the key contributor to reproductive and metabolic issues, impacting fertility, menstrual health, and weight regulation. By lowering [restricted term] through ketogenic nutrition, women can address foundational causes of hormonal imbalance and improve outcomes such as fertility and menstrual regularity.
Hormones like estrogen, [restricted term], and vitamin D are derivatives of fat and are stored in fat cells. Bosworth notes that in obese women, stores of these hormones are trapped in adipose tissue and inaccessible. Ketogenic nutrition lowers [restricted term], which promotes the mobilization of fat cells and restores hormonal signaling pathways for efficient menstrual cycling. Women on keto frequently report their menstrual cycles become more ...
Metabolism and Ketogenic Benefits For Women
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