The Diary of a CEOMindy Pelz: Fasting can replicate many Ozempic benefits
Pelz argues time-restricted eating can replicate many Ozempic effects; she covers ingredient labels, hormone-cycle fasting for women, and craving rewiring.
CHAPTERS
- 2:14 – 9:15
Fasting as Empowerment and the Global Impact of ‘Fast Like a Girl’
The conversation opens by reflecting on life-changing listener stories from the previous episode and the explosive global reception of Dr Mindy Pelz’s book. She frames fasting as a uniquely empowering tool because it doesn’t cost money, doesn’t require prescriptions, and forces people to reclaim agency over their health.
- •Listener testimonials highlight weight loss, confidence, and the ability to ‘do hard things’ through fasting.
- •Pelz describes building her protocols over 10 years of clinical work and large-scale YouTube experiment data.
- •Over 700,000 copies of ‘Fast Like a Girl’ sold worldwide, with overwhelming positive feedback and DMs.
- •She contrasts the disempowerment of the traditional doctor–drug model with the self-reliance fasting creates.
- 9:15 – 13:40
Evolutionary Basis of Fasting and the ‘Thrifty Gene’
Pelz explains how humans evolved to switch between glucose and fat as fuel, like a hybrid car, and how constant eating has turned this survival advantage into a liability. She introduces the thrifty gene hypothesis to explain why not using our fat-burning system now may predispose us to modern chronic disease.
- •Hunter–gatherers went long periods without food; low blood sugar triggered fat burning and ketone production.
- •Ketones sharpened focus and physical performance to help our ancestors find food.
- •Modern food abundance and constant snacking mean most people never engage their fat-burning system.
- •The thrifty gene theory suggests survival favored those who could switch to fat burning; now that same gene is underused and may contribute to metabolic diseases when we overeat constantly.
- 13:40 – 17:35
Food Lies, Ingredient Labels, and Eating Frequency Myths
Pelz dismantles the assumption that everything in the supermarket is safe and calls out regulatory gaps that allow untested chemicals into food. She also critiques the culturally entrenched idea of ‘breakfast is the most important meal’ and frequent snacking as marketing, not science, and explains the science behind time-restricted eating.
- •Many additives fall under GRAS (‘Generally Recognized As Safe’) without strong evidence of safety.
- •The food and drug functions are combined in one US agency, which she argues is structurally conflicted.
- •Simple ingredient rule: if you can’t recognize or pronounce it, look it up; many are disease-promoting chemicals.
- •Avoid middle aisles; prioritize foods without labels (whole produce, clean animal foods).
- •The ‘breakfast is the most important meal’ slogan originated from a 1970s Kellogg’s campaign.
- •Research from Valter Longo, Satchin Panda and others shows compressed eating windows (time-restricted eating) improve metabolic health, independent of calorie counting.
- 17:35 – 32:52
Time Restriction vs Calorie Restriction and the Rise of Ozempic
The discussion compares time-restricted eating with traditional calorie restriction and then pivots to Ozempic as a cultural phenomenon. Pelz emphasizes that fasting drives healing via metabolic switching and nutrient absence, while calorie restriction often just spreads small meals across the day. She then weighs Ozempic’s benefits, limitations, and long-term unknowns against the accessible power of fasting.
- •Time restriction: defined eating and fasting windows; extended fasting windows activate healing pathways and ketone production.
- •Calorie restriction: small meals all day; doesn’t necessarily lower insulin or enable fat burning.
- •Ozempic’s upsides: reduced hunger and significant weight loss for some in metabolic crisis.
- •Concerns: high monthly cost, side effects, and ~70% discontinuation within two years.
- •She sees Ozempic and fasting as potentially combinable but stresses that fasting builds internal power whereas drugs risk outsourcing it.
- •Both host and guest worry about a comfort-obsessed culture that removes all difficulty, and the historical pattern of regretting such trade-offs later.
- 32:52 – 35:50
Keto, Ketones, and How Long You Need to Fast
Pelz clarifies the difference between nutritional ketosis via diet and ketone production via fasting. She advocates ‘ketobiotic’ approaches that include fiber-rich plants, especially for women, and outlines typical timeframes for switching from sugar burning to fat burning.
- •She supports *pulsing* ketones, preferably through fasting, rather than chronic ultra-low-carb ketogenic diets.
- •Early keto trends often pushed high meat, low plant intake; problematic for women who need fiber for estrogen metabolism.
- •Her term ‘ketobiotic’ means combining lower processed carbs with plenty of vegetables and fasting-induced ketones.
- •Most people begin metabolic switching around 12 hours after last meal; full transition to fat burning may take ~4 additional hours.
- •Some individuals have a ‘sluggish switch’ and need cleaner diets or more practice to fast comfortably.
- 35:50 – 47:34
Fasting Rules, Common Mistakes, and Microbiome Remodeling
Here the focus is on practical fasting: what does and doesn’t break a fast, frequent mistakes, and the impact on the gut microbiome and cravings. Pelz stresses customization—fasting is not one-size-fits-all—and describes how both harmful and helpful microbes are affected when we stop eating.
- •Water, black coffee (preferably organic), and plain teas are generally compatible with fasting; additives and sweeteners can spike blood sugar or hunger.
- •Common mistakes: drinking diet sodas or sweetened drinks during the fast, assuming ‘not chewing’ equals fasting, and ignoring food quality.
- •One-size-fits-all protocols fail; people can choose to skip breakfast, dinner, or do lunch-to-lunch fasts based on lifestyle.
- •Eating in daylight and fasting after dark is supported by melatonin/insulin research.
- •Fasting starves both good and bad gut microbes; the ‘first meal matters’ to feed beneficial bacteria with prebiotic, probiotic, and polyphenol-rich foods.
- •Studies like the Every Other Day Diet show that periodic fasting can improve metabolic markers and, over months, shift taste preferences toward healthier foods—likely via microbiome changes.
- 47:34 – 49:48
Beyond Weight Loss: Mental Health, Ketones, and GABA
Pelz highlights lesser-known benefits of fasting, especially for mental health. She connects ketone production to improved mood, calm focus, and reduced inflammation, drawing on evolutionary logic from hunter–gatherer survival.
- •Longer fasts (e.g., structured 36-hour protocols) preferentially reduce belly fat and waist circumference.
- •The major ‘surprise benefit’ people report is mental clarity, increased happiness, and resilience.
- •Ketones reduce inflammation and hunger while providing a premium fuel for the brain.
- •Ketones are associated with higher levels of GABA, a calming neurotransmitter that reduces anxiety and promotes steady focus.
- •In ancestral contexts, ketones had to sharpen cognition and maintain calm under hunger so humans could successfully hunt.
- 49:48 – 58:04
Women’s Cycles, Fasting, and Workplace Design
This chapter dives deep into female hormones, why the week before menstruation is not ideal for fasting, and the health implications of missing periods. Pelz also explores how workplaces could adapt to women’s hormonal rhythms through flexible time-off policies.
- •Estrogen (early cycle) thrives with insulin sensitivity and can pair well with fasting and lower carbs.
- •Progesterone (late luteal phase, ~week before period) needs higher glucose and low cortisol; heavy fasting or intense exercise then can blunt progesterone peaks.
- •Fasting at the wrong time can cause women to lose cycles, shed less toxic menstrual blood, and disrupt detoxification of plastics, phthalates, parabens, and other chemicals.
- •She urges women without cycles to reconsider; absence of menstruation may feel ‘convenient’ but signals deeper hormonal disruption.
- •Suggested workplace approach: universal ‘three days a month, no-questions-asked’ time off that women can use pre-menstruation to support hormonal health without stigma.
- 58:04 – 1:04:25
Glycemic Hacks: Apple Cider Vinegar, Meal Timing, and Feast–Famine Cycling
Pelz explains the popularity and mechanism of apple cider vinegar as a blood sugar stabilizer and situates it within a broader discussion of how often we should eat. She favors feast–famine cycling over rigid one-meal-a-day (OMAD) patterns, especially for women.
- •Apple cider vinegar (diluted) before or after meals can blunt glucose spikes by supporting gut microbes that signal the liver.
- •Children’s and adults’ blood sugar responses are partly mediated by the microbiome; long-term medications like birth control can skew bacterial balance.
- •Hunter–gatherers alternated feasts after big kills with natural famines; our biology expects variability, not constant grazing or constant OMAD.
- •One-meal-a-day can be harmful for women when done chronically—linked to hair loss, cycle loss, irritability—if not cycled with higher-intake days.
- •Pelz recommends varying meal frequency across the week and within the menstrual month rather than rigid daily patterns.
- 1:04:25 – 1:11:59
Cancer-Feeding Foods, Obesogens, and the Broken Food System
The discussion turns to specific foods and chemicals that drive cancer and obesity, especially in children. Pelz details how obesogens reprogram stem cells and warns about processed meats, sugary kids’ products, and ultra-processed oils, arguing that relying on drugs like Ozempic without reforming the food system is ethically untenable.
- •Processed meats, especially hot dogs, have been linked to higher childhood leukemia rates in observational studies.
- •Sugar, toxic seed oils, sugary cereals, neon-colored yogurts (e.g., Go-Gurt), donuts, and juice boxes are framed as ‘cancer-feeding’ and obesogenic.
- •Obesogens are chemicals that turn multipurpose stem cells into fat cells rather than bone or other tissues.
- •Childhood height is declining while weight is increasing, suggesting more fat and less bone mass.
- •She cites Science for Public Interest reviews documenting how many ubiquitous chemicals promote obesity.
- •Pelz is angered that we created weight-loss drugs instead of regulating obesogens, calling for consumer ‘voting with dollars’ and systemic change.
- 1:11:59 – 1:20:55
Reimagining the Food System and Using Fasting for Repair
Asked how she’d fix global food if given a magic wand, Pelz prioritizes education, real-time glucose feedback, and removal of food chemicals. She then describes how longer fasts can increase stem cells and potentially accelerate tissue repair, drawing on both research and personal anecdotes.
- •She would implement large-scale metabolic education and put continuous glucose monitors on everyone so people can see real-time effects of foods.
- •She would outlaw food chemicals and redesign supermarkets around ugly, seasonal produce, regenerative meats, eggs, and fermented breads that spoil quickly.
- •Fasting boosts stem cells: 24-hour fasts aid gut repair; ~72-hour water fasts increase systemic stem cells.
- •She recounts healing a chronic Achilles tendon injury with a five-day water fast, attributing improvements to reduced inflammation and stem-cell-driven repair.
- •Valter Longo’s work shows three-day fasts can reboot the immune system and fast-mimicking diets can encourage pancreatic cell regeneration in type 1 diabetics.
- 1:20:55 – 1:37:57
Protein, Liver Health, and Simple Daily Body Checks
The focus shifts to protein intake strategies, the central role of the liver in hormone and metabolic regulation, and practical ways to self-assess health daily (eyes, tongue, feet, nails, hair). Pelz also addresses soil depletion and the importance of minerals.
- •She supports a higher-protein approach for many, targeting ~1–2 grams of protein per pound of *desired* body weight, but spread across meals rather than in one mega-serving.
- •At least 30g protein at the first meal helps activate amino acid sensors and muscle uptake.
- •Overdoing protein in metabolically unhealthy, midlife women can backfire, turning excess amino acids into glucose and fat; personalization is crucial.
- •The liver converts inactive thyroid hormone (T4) and metabolizes estrogen; a sluggish liver can manifest as low metabolism, hot flashes, or mood issues.
- •Simple markers: yellow inner eye corners, cracked heels, slow nail and hair growth, ridged nails, and coated tongues can indicate liver stress, mineral deficiency, or candida.
- •Soil depletion from conventional farming reduces mineral content of produce; regenerative agriculture or mineral supplementation (e.g., fulvic/humic complexes, magnesium, zinc, selenium) can help.
- 1:37:57 – 1:49:12
Alcohol, Oxytocin, Loneliness, and Food Choices
Pelz lays out a nuanced view on alcohol: it is never a ‘health food’ but may, in rare, intentional use, facilitate connection and oxytocin. She then explores how oxytocin buffers stress, shapes dietary behavior, and offers practical ways for lonely or stressed individuals to increase oxytocin without relying on substances.
- •Alcohol harms brain, liver, and hormone health; even small amounts can trigger hot flashes and impair fat burning.
- •In specific contexts, a small glass of clean, low-toxin wine might lower cortisol enough to enable social connection and oxytocin release—but the risk is habitual reliance.
- •Oxytocin is framed as a ‘healing hormone’ that downregulates cortisol and improves resilience.
- •Loneliness and low oxytocin likely drive higher cortisol, greater appetite, and worse food choices.
- •Simple oxytocin boosters: hugging loved ones, petting a dog, self-havening (rubbing your own arms), ecstatic dancing, gratitude practices, and deep conversation.
- •She references data showing that smokers with strong social ties have lower lung cancer incidence than lonely smokers, emphasizing the health-protective power of connection.
- 1:49:12 – 1:59:11
The DOAC Health Toolbox: A Systems Approach to Wellbeing
In a visual segment using a branded toolbox, Pelz demonstrates how different health tools—fasting, protein, fiber, fats, supplements, exercise, and social connection—should be selected contextually rather than idolized in isolation. The episode closes with a reflection on loving life and the mutual appreciation between host and guest.
- •She compares health behaviors to tools in a box: you don’t compare a hammer to a screwdriver; you choose what the job requires.
- •Examples of ‘tools’: supplements when diet is lacking, strength training after travel, fasting for autophagy, eggs for choline and brain health, avocados for satiety and blood sugar, cruciferous vegetables for estrogen metabolism, and conversation cards for oxytocin and connection.
- •Rigid thinking—e.g., ‘protein is always best’, ‘cardio beats strength’, ‘fasting is always good’—misses the point of personalization and timing.
- •Ideal health practice emerges from knowing your body’s current needs and flexibly combining tools rather than chasing single magic solutions.
- •Pelz answers the closing ‘last guest’ question affirming she is deeply in love with life and feels it loves her back, crediting meaningful work and relationships.
