Somewhere in the last few years, cortisol became the reason for everything: the puffy face, the belly, the three am wake-up, the cravings. And a whole industry turned up to sell you the fix, with the drinks, the panels and the supplement stacks to match. This episode goes through what cortisol actually is, what those tests can and can't tell you, what the research really shows on ashwagandha, magnesium and the rest, and then the part that matters: what actually pushes a nervous system out of rhythm, and what brings it back. Most of the second list you can't buy. We cover: why "my cortisol is high" means nothing without a time of day, and what a healthy cortisol curve looks likethe six things that reliably dysregulate a nervous system, and why undereating is at the topthe unsellable list: what actually regulates itwhen to skip all of this and see an endocrinologistThe question to sit with: would a body eating what you ate yesterday be expected to feel calm? Referenced: Cadegiani & Kater on "adrenal fatigue" · Tomiyama and colleagues on calorie restriction and cortisol · Loucks on low energy availability · Lovallo on caffeine and cortisol · the Endocrine Society's Cushing's guideline on salivary cortisol · meta-analyses on ashwagandha (Akhgarjand 2022; Albalawi 2025) · Boyle on magnesium · Jamshidi & Cohen on holy basil · Crum, Salovey & Achor and Keller and colleagues on stress mindset. Full links below. Previous episode mentioned: Why you binge at night even when you've already eaten enough. If the boring list is the one you've been trying to get to on your own, that's what my free 14 day reset is. One small thing a day, food first, nothing to buy, no Monday required. [Sign up here →] SOURCES Cadegiani, F.A. & Kater, C.E. (2016). "Adrenal fatigue does not exist: a systematic review." BMC Endocrine Disorders, 16, 48. https://pubmed.ncbi.nlm.nih.gov/27557747/Tomiyama, A.J. et al. (2010). "Low calorie dieting increases cortisol." Psychosomatic Medicine, 72(4), 357–364. https://pubmed.ncbi.nlm.nih.gov/20368473/Nakamura, Y. et al. (2016). "Systematic review and meta-analysis reveals acutely elevated plasma cortisol following fasting but not less severe calorie restriction." Stress, 19(2), 151–157. https://www.tandfonline.com/doi/full/10.3109/10253890.2015.1121984Loucks, A.B. et al. (1998). "Low energy availability, not stress of exercise, alters LH pulsatility in exercising women." Journal of Applied Physiology, 84(1), 37–46. https://journals.physiology.org/doi/full/10.1152/jappl.1998.84.1.37Lovallo, W.R. et al. (2005). "Caffeine stimulation of cortisol secretion across the waking hours in relation to caffeine intake levels." Psychosomatic Medicine, 67(5), 734–739.Nieman, L.K. et al. (2008). "The diagnosis of Cushing's syndrome: an Endocrine Society clinical practice guideline." Journal of Clinical Endocrinology & Metabolism, 93(5), 1526–1540. (Late-night salivary cortisol as a first-line screening test.)Akhgarjand, C. et al. (2022). "Does ashwagandha supplementation have a beneficial effect on the management of anxiety and stress? A systematic review and meta-analysis of randomized controlled trials." Phytotherapy Research, 36(11), 4115–4124. https://pubmed.ncbi.nlm.nih.gov/36017529/Albalawi, A.A. (2025). "Dual impact of ashwagandha: significant cortisol reduction but no effects on perceived stress. A systematic review and meta-analysis." Nutrition and Health. https://journals.sagepub.com/doi/abs/10.1177/02601060251363647Björnsson, H.K. et al. (2020). "Ashwagandha-induced liver injury: a case series from Iceland and the US Drug-Induced Liver Injury Network." Liver International, 40(4), 825–829.Boyle, N.B., Lawton, C. & Dye, L. (2017). "The effects of magnesium supplementation on subjective anxiety and stress: a systematic review." Nutrients, 9(5), 429. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5452159/Jamshidi, N. & Cohen, M.M. (2017). "The clinical efficacy and safety of tulsi in humans: a systematic review of the literature." Evidence-Based Complementary and Alternative Medicine, 2017, 9217567. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5376420/Crum, A.J., Salovey, P. & Achor, S. (2013). "Rethinking stress: the role of mindsets in determining the stress response." Journal of Personality and Social Psychology, 104(4), 716–733. https://sparq.stanford.edu/sites/g/files/sbiybj19021/files/media/file/crum_et_al.*2013*_rethinking_stress.pdfKeller, A. et al. (2012). "Does the perception that stress affects health matter? The association with health and mortality." Health Psychology, 31(5), 677–684. https://pmc.ncbi.nlm.nih.gov/articles/PMC3374921/On "cortisol face": University of Colorado Anschutz, Department of Medicine. https://news.cuanschutz.edu/department-of-medicine/cortisol-face If this episode hit home, I'd love for you to join me inside The Nourished Reset: a free 14-day guided experience to help you break free from nighttime overeating, food noise and the guilt spiral, so you can finally feel calm around food and at home in your body. No restriction, no willpower, just real tools that actually work. [Sign up here →] And if you're ready to go even deeper, Embodied Nourishment is my signature 16-week coaching program to help you lose that stubborn weight, break free from emotional eating and finally feel calm, confident and free around food - for good. 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