Dr. Sara Szal: Cortisol Is The Dictator Behind Belly Fat

Cortisol is not just a “stress hormone”; it’s essential for survival and dominates other hormones. Chronic high cortisol is linked to more belly fat (abdominal fat cells have more cortisol receptors), depression, brain shrinkage in midlife women (but not men), low heart rate variability, and lower testosterone production. Trauma and toxic stress often create a pattern of initially high cortisol that can later crash into low cortisol (seen in PTSD). Szal finds ~90% of her patients—including elite athletes—have cortisol dysregulation. She starts treatment with awareness (testing), then N-of-1 experiments using breathwork, meditation, rhythmic movement, and sometimes adaptogens (ashwagandha, phosphatidylserine, rhodiola) rather than immediately using drugs.

The ACE questionnaire (10 items) predicts risk of 45 chronic conditions; even a score ≥1 increases risk, and Szal’s own score is 6. ACEs show up via immune dysregulation (allergies, histamine overload, autoimmunity), nervous system problems (anxiety, depression, PTSD), and endocrine/metabolic issues (chronic cortisol problems, prediabetes/diabetes). Her own ACE-related issues emerged in her 30s as depression, severe PMS, stubborn post‑pregnancy weight, high cortisol (3× optimal), and prediabetes—none of which her conventional doctor investigated beyond offering Prozac, the pill, and “exercise more, eat less.” She used lifestyle medicine, wearables, and trauma work (including psychedelic-assisted therapy) to heal, illustrating that ACE-driven patterns are modifiable, not destiny.

Randomized drug trials create “medicine for the average,” not optimized care for individuals. For example, statins may require treating 100–200 people for one to benefit, yet they dominate guidelines because they’re profitable; meanwhile, lifestyle medicine could prevent ~70% of current diseases but isn’t incentivized. Precision medicine instead starts with deep profiling—genomics, biomarkers, wearables—and runs N-of-1 experiments where each person is their own control, tailoring nutrition, hormone support, and lifestyle to their specific goals (e.g., entrepreneur, athlete, perimenopausal woman). Prevention and pre‑disease (like prediabetes, borderline blood pressure, early inflammation) are prime intervention windows that mainstream care largely ignores.

Perimenopause typically begins between 35–45 as ovarian mitochondria and egg supply decline; it’s not just fluctuating estrogen and progesterone, but also changes in metabolism, brain glucose use, and immunity, with skyrocketing autoimmunity risk. There are over 100 possible symptoms—mood swings, sleep issues, night sweats, painful sex, new belly fat, reduced stress tolerance—yet doctors often dismiss women as “too young” or prescribe birth control pills, which Szal views as the wrong fix. She states 73–75% of women are not offered adequate perimenopause/menopause care and believes many symptoms are avoidable with timely hormone therapy (estrogen, progesterone, sometimes testosterone) plus heavy resistance training, cardio fitness, optimal glucose disposal, and tailored nutrition.

Men have ~10× more testosterone, but it’s the most abundant hormone in women as well and underpins vitality, confidence, risk tolerance, libido, muscle response to training, and mood in both sexes. Low testosterone in men shows up as belly fat, gynecomastia, low libido, ED, mood issues, and cardiovascular changes; in women, as fatigue, low sex drive, hair loss, and poor gym response. High female testosterone often reflects PCOS, tied to infertility, hirsutism, acne, insulin resistance, and mitochondrial stress. Chronic high cortisol suppresses testosterone; endocrine disruptors (BPA, parabens, flame retardants) and gut microbiome imbalances recirculating estrogen also distort hormone balance. For PCOS, she notes that a lower‑carb diet can meaningfully reduce testosterone within seven days.