The Diary of a CEODr. Sara Szal: Cortisol Is The Dictator Behind Belly Fat
How chronic cortisol elevation drives belly fat, mood crashes, and brain shrinkage; perimenopause symptoms go without proper treatment for most midlife women.
CHAPTERS
- 0:00 – 7:10
Intro: Hormones, Belly Fat, and a Broken System for Women
The episode opens with the stark statistic that roughly three-quarters of women don’t receive appropriate treatment for perimenopause and menopause, despite experiencing symptoms like new belly fat, stress intolerance, and low libido. Host Steven Bartlett introduces Dr. Sara Szal, a Harvard-trained hormone expert, who argues that hormone imbalance is rampant and that cortisol problems are especially widespread. She sets up her core thesis that many menopausal symptoms and hormone-related complaints are preventable or reversible with the right approach.
- •73–75% of women lack adequate perimenopause/menopause treatment.
- •Common complaints include sudden belly fat, poor stress tolerance, and reduced sex drive.
- •Most people have hormone imbalances, especially involving cortisol.
- •Dr. Szal believes many menopausal symptoms are avoidable with proper care.
- •Hormones are described as the body’s “text messages” coordinating systems.
- 7:10 – 30:00
From Surgeon to Healer: Training, Philosophy, and Precision Medicine
Szal recounts her journey through elite bioengineering and medical training, including surgery and OB/GYN, and her evolution into a physician who bridges conventional medicine with Ayurvedic and Chinese traditions. She rejects the idea that doctors “heal” people, instead seeing herself as activating patients’ innate healing capacity. As a director of precision medicine, she contrasts individualized, data-rich care with what she calls conventional “medicine for the average,” critiquing profit-driven over-reliance on drugs.
- •Background in Harvard–MIT bioengineering, surgery, OB/GYN, and primary care.
- •Blends conventional medicine with wisdom traditions like Ayurveda and TCM.
- •Sees herself as a healer who activates patients’ inherent healing capacity.
- •Has worked with ~40,000 people, from athletes to executives.
- •Precision medicine uses genomics, biomarkers, and wearables for N‑of‑1 experiments.
- •Randomized drug trials drive guidelines but ignore individual optimization.
- •Lifestyle medicine can prevent ~70% of modern diseases but is underused.
- 30:00 – 44:10
Trauma, ACEs, and Discovering Her Own Cortisol and Metabolic Crisis
Szal links her career motivation to significant childhood trauma measured via a high ACE score (6/10), explaining how ACEs elevate risk for 45 chronic diseases. In her 30s she experienced depression, PMS, stubborn baby weight, high cortisol, and prediabetes—problems her doctor attempted to treat with Prozac, the pill, and generic diet/exercise advice. Unsatisfied, she ordered her own labs, uncovered severe cortisol dysregulation and prediabetes, and began a personal journey using scientific literature and lifestyle interventions to heal herself and later her patients.
- •ACEs (Adverse Childhood Experiences) predict higher risk of 45 chronic diseases.
- •Women generally have higher ACE scores and more trauma exposure than men.
- •Szal’s own issues: depression, PMS, weight retention, prediabetes, very high cortisol.
- •Mainstream physician offered Prozac, birth control, and “eat less, exercise more.”
- •She self-ordered labs: morning cortisol ~30 (vs. optimal 10–15) and prediabetic labs.
- •ACEs can manifest as immune, nervous system, or endocrine/metabolic issues.
- •Her healing relied on lifestyle medicine and self-experimentation, not pharmaceuticals.
- 44:10 – 59:10
Cortisol: Dictator Hormone, Trauma Link, and Tools to Rebalance
The conversation dives deep into cortisol’s outsized role among hormones. Szal explains its necessity for survival and its damaging effects when chronically elevated: belly fat gain, depression, brain shrinkage in women, and suppression of testosterone. She clarifies that stress reduction alone (like holidays) often doesn’t normalize cortisol because the body can become locked into maladaptive patterns, especially after trauma. She outlines top-down (cognitive) and bottom-up (sensory, breathwork, movement) approaches, plus targeted supplements, to restore balance.
- •Cortisol is essential but becomes a “dictator” when dysregulated.
- •High cortisol contributes to depression; about half of depressed people have high cortisol.
- •Abdominal fat cells have more cortisol receptors, promoting belly fat.
- •High midlife cortisol shrinks women’s brains and impairs brain glucose use.
- •Trauma and PTSD often follow a pattern of initial high, then low cortisol.
- •Breathwork (e.g., 5‑second inhale, 7‑second exhale, ~6 breaths/min), meditation, and rhythmic movement help rebalance.
- •Supplements like Cortisol Manager (ashwagandha, phosphatidylserine) and rhodiola can lower or modulate cortisol, especially in high‑stress performers.
- 59:10 – 1:11:40
Endocrine Disruptors, Toxins, and the Modern Attention Economy
Szal outlines how more than 700 endocrine-disrupting chemicals disrupt hormones, including BPA in plastics, parabens in skincare, and flame retardants. She notes that men also need estrogen and progesterone—for bones and sleep—even at lower levels. Both she and Bartlett observe a rise in nervous system dysregulation since the pandemic and with increasing digital engagement, as attention-maximizing algorithms often rely on dysregulating content to retain users.
- •Endocrine disruptors include BPA (plastics, can linings), parabens (skincare), flame retardants, etc.
- •Estrogen and progesterone are important for men’s bone health and sleep.
- •Szal sees rising dysregulation in wearable data (HRV, cortisol) since COVID.
- •Digital life and social media algorithms exploit attention by triggering stress responses.
- •Optimizing hormones includes reducing toxin exposures in skincare, cleaning products, plastics, and improving air quality.
- 1:11:40 – 1:30:00
Metabolic Health, CGMs, Supplements, and Personalized Nutrition
The discussion turns to blood sugar and metabolic health as foundations for hormonal balance and energy. Szal advocates for continuous glucose monitors as powerful behavior-change tools, explaining how she tailors diets to genetics, goals, and biomarker patterns. She highlights common nutrient deficiencies—especially vitamin D and B vitamins—and a case study of an executive with prediabetes, inflammation, and rising cholesterol whose athletic identity had faded. She repositions him as an “athlete” again to drive behavior change via exercise and methylated B vitamins.
- •CGMs provide real-time feedback on food’s impact; nothing else changes behavior as effectively.
- •Vitamin D deficiency is widespread; it has ~400 roles, including maintaining gut barrier integrity.
- •B‑vitamin-related methylation issues can be spotted via elevated homocysteine; methylated B supplements help.
- •Metabolic pre-disease markers (borderline glucose, BP, inflammation) should be addressed early.
- •Strength training and regular exercise are essential for glucose disposal and mitochondrial health.
- •Personalized nutrition considers goals (athlete vs. executive vs. perimenopausal woman) and genetics.
- 1:30:00 – 2:15:50
Testosterone, Estrogen, PCOS, and Keto: Sex Differences in Hormone–Food Interactions
Szal explains the roles of testosterone and estrogen in both sexes, including libido, confidence, body composition, risk-taking, and bone and brain health. She discusses signs of low and high testosterone, especially PCOS in women, and how insulin resistance and diet influence androgen levels. The pair explore ketogenic diets and fasting: beneficial for some, but more challenging for women, with potential impacts on thyroid, cortisol, serotonin, and exercise performance. She stresses biomarker monitoring when adopting strict low-carb or long-term keto.
- •Men’s healthy testosterone range is ~500–1,000 ng/dL; women’s levels are much lower but very impactful.
- •Low testosterone symptoms: belly fat, gynecomastia, low libido, ED, mood changes (men); fatigue, low libido, poor training response, hair loss (women).
- •High testosterone in women is often due to PCOS: hirsutism, acne, infertility, and frequent insulin resistance.
- •High cortisol reduces testosterone; PCOS-related high testosterone can fall with lower‑carb diets within seven days.
- •Ketogenic diets often work better for men; in women they may disrupt thyroid and menstrual cycles in ~45%.
- •Keto can improve insulin but may raise LDL in some and affect sleep via serotonin changes.
- •She recommends periodic biomarker checks for anyone staying on keto beyond a few weeks.
- 2:15:50 – 3:03:00
Perimenopause, Menopause, and the Women’s Health Gap
Szal outlines perimenopause as a dynamic 35–45+ life stage marked by ovarian aging, fluctuating hormones, brain fuel shifts, and heightened autoimmunity risk. She laments a large research and care gap: women are often misinformed, dismissed as “too young,” or given birth control pills instead of tailored hormone therapy and lifestyle plans. She critiques the pill for raising inflammation, increasing autoimmune risk, lowering free testosterone, and even shrinking the clitoris, arguing that most women aren’t given proper informed consent.
- •Perimenopause usually begins between 35–45 and involves more than estrogen/progesterone changes.
- •Symptoms include mood swings, insomnia, night sweats, painful sex, decreased libido, and new belly fat.
- •73–75% of women don’t receive appropriate perimenopause/menopause treatment (e.g., hormone therapy).
- •Hormone therapy plus lifestyle (weights, cardio, glucose control, nutrition) can prevent many symptoms.
- •Birth control pills are overused in this phase and can increase inflammation, autoimmune risk (e.g., Crohn’s), reduce hormonal flexibility, deplete free testosterone, and shrink the clitoris by up to ~20%.
- •She prefers IUDs or barrier methods that don’t disrupt “hormonal intelligence.”
- 3:03:00 – 3:17:30
Gender, Stress, Autoimmunity, and the Cost of Being Female
The conversation zooms out to the systemic “women’s health gap.” Szal notes that women have higher rates of depression, PTSD, insomnia, autoimmune disease, and thyroid dysfunction, influenced by both biological sex differences and gendered social roles. Women experience more stress and trauma (including much higher rates of sexual violence), often shoulder disproportionate emotional labor, and struggle with boundaries and saying no. These patterns, she argues, interact with biology to make being female a health hazard—and must be addressed through cultural, structural, and personal changes.
- •Women have ~2× depression, 2× PTSD, 2× insomnia, 4× autoimmune disease, and 9× thyroid dysfunction compared with men.
- •Women report ~10% more stress and trauma; they’re ~14× more likely to be raped.
- •Sympathetic (fight/flight) vs. parasympathetic (rest/digest) balance is often skewed in women toward chronic activation.
- •Gender norms promote overgiving and difficulty setting boundaries, fueling autoimmunity and burnout.
- •Biological sex differences (hormones, X chromosomes) plus gendered power imbalances drive the women’s health gap.
- •Closing the gap requires systemic change and rebalancing power and emotional labor.
- 3:17:30 – 4:00:00
Relationships, Divorce, Sex, and Nervous System Regulation
Szal shares her recent divorce after a 22‑year relationship, describing chronic misattunement, poor conflict repair, and loneliness within the marriage despite extensive couples therapy. She credits psychedelic-assisted therapy for helping her see her trauma patterns and “trauma bond” more objectively, though her ex was unwilling to pursue it. The discussion broadens into how sexual polarity, emotional connection, and intentional erotic exploration impact long-term relationships and nervous system regulation—orgasm being a potent way to shift into parasympathetic states.
- •Her marriage involved unresolved trauma dynamics and insufficient emotional repair, leading to a sense of loneliness.
- •She ultimately chose being alone over staying in a misaligned relationship.
- •Psychedelic-assisted therapy can help resolve trauma signatures and clarify relational truth, though it’s not for everyone.
- •Women often need emotional connection to open sexually; many men need sex to feel emotionally connected.
- •Sexless or low-polarity marriages are common and may reflect deeper emotional disconnection.
- •Eroticism and polarity (including consensual play with dominance/submission) can be healing and enlivening.
- •Orgasm is a powerful tool for nervous system regulation and stress relief.
- 4:00:00
Behavior Change, Alcohol, HRV, Sleep, and Daily Brain Care
In the closing section, Szal emphasizes sleep and recovery as foundational for hormonal and metabolic health. One night of poor sleep raises cortisol and insulin, increases carb cravings, and undermines energy. She uses wearables to track HRV, sleep stages, and breathing, and notes how alcohol can depress HRV for a week or more—one of the reasons Steven quit drinking. She also mentions practices like grounding, time in nature (especially Costa Rica), microdosing mushrooms, and morning sunlight exposure along the horizon as daily rituals that support brain health and circadian alignment.
- •Sleep is “as close to a panacea as we have”; most people need ~7–8 hours.
- •Even one bad night of sleep raises cortisol and insulin and drives carb cravings.
- •HRV is a key marker of autonomic balance; alcohol significantly lowers HRV for 7–9 nights.
- •Grounding, time in nature, and climates like Costa Rica can dramatically improve HRV.
- •Microdosing psilocybin appears to raise her HRV.
- •Morning light exposure, especially 30+ minutes tracing the horizon, supports circadian rhythm, melatonin, mood, and brain health.
- •She encourages using wearables (Whoop, Oura, sleep tech) to guide sleep and stress interventions.
