Excess Matters

Tag: thyroid

  • The Power of Hormones by Max Nieuwdorp: Summary, Key Ideas & Review

    Book in one sentence: A practicing endocrinologist walks you through every major hormone in the human body, from insulin to oxytocin, and shows why they cannot be understood in isolation from each other.

    What Is The Power of Hormones About?

    Picture the standard medical model of your hormones: a tidy diagram of glands, each one producing its own molecule, each one working in its lane. The thyroid does thyroid things. The pancreas does pancreas things. The adrenals do adrenal things. Clean, separate, manageable.

    Max Nieuwdorp, a professor of internal medicine at Amsterdam University Medical Center, has spent twenty years watching that model fail his patients. His book is a correction. The endocrine system is not a list of glands. It is a communication network, and nothing in it operates alone. Estrogen affects cortisol. Cortisol suppresses the hormones that govern ovulation. Gut bacteria determine how sensitive your cells are to insulin. Stress disrupts thyroid conversion. That chain of influence is not theoretical. It is the reason a hard year can derail your menstrual cycle, a course of antibiotics can trigger months of metabolic disruption, and a sleep deficit can make weight loss feel physiologically impossible.

    The book covers everything: insulin, cortisol, thyroid, growth hormone, testosterone, estrogen, oxytocin, leptin, ghrelin, GLP-1. It moves through the human lifespan from conception to old age, organized as narrative history as much as science (the discovery of insulin, the cortisol story, how the contraceptive pill changed society). Nieuwdorp is not a wellness influencer extrapolating from mouse studies. He is a working clinician who has also published research on fecal microbiota transplantation and insulin sensitivity, and the distinction shows on every page.

    Why Insulin and Cortisol Matter More Than You Think for Weight

    For readers on a weight or eating journey, two chapters stand out: the ones on obesity and hunger, and the one on stress.

    Insulin: blessing and curse

    Nieuwdorp describes insulin as “both a blessing and a curse.” That is not a throwaway line. Insulin is essential to life (without it, glucose cannot enter cells and you die). But in chronic dysregulation, the same molecule becomes a driver of fat storage, systemic inflammation, and metabolic disease. Insulin resistance is the pivot: when cells stop responding to insulin’s signal, the pancreas compensates by producing more, and chronically elevated insulin promotes fat storage while blocking fat breakdown. The body cannot easily access its own stored energy.

    What makes the insulin chapter useful for this audience is that Nieuwdorp connects it to eating behavior, not just blood sugar numbers. The gut’s own satiety hormones (GLP-1, CCK) are released in response to food and normally help the body regulate intake. When insulin signaling is chronically disrupted, that whole feedback loop becomes less reliable. Hunger signals stop reflecting actual caloric need. The relationship between what you eat and how satisfied you feel gets decoupled.

    Cortisol and the cascade it triggers

    The stress chapter does something most popular health books skip: it shows the precise mechanism by which chronic stress becomes a weight and eating problem, not just a mood problem.

    Chronically elevated cortisol suppresses GnRH, which lowers FSH and LH, which shuts down ovarian production of estrogen and progesterone. It also impairs the conversion of inactive T4 to active T3 in peripheral tissues, compounding any subclinical thyroid dysfunction. It promotes leptin resistance, making the brain less able to detect that you have enough stored energy. It disrupts sleep architecture, reducing the deep sleep during which growth hormone is released and tissues repair.

    Nieuwdorp’s clinical example is not exotic: a high-achieving woman with twelve-hour workdays, five gym sessions per week, four to five hours of sleep, absent menstruation, and labs that read as normal. The treatment is not a hormone prescription. It is more food, less exercise intensity, and more sleep. The hormones are not malfunctioning; they are responding correctly to the load the system is under. Stress reduction, adequate calories, and sleep restoration are hormone therapies, whether or not anyone frames them that way.

    How Does Your Body Defend Its Weight Against You?

    The obesity chapter is where Nieuwdorp’s book earns its place on the shelf for anyone who has ever felt like their body was working against them during weight loss. Because it is, and he explains exactly how.

    Ghrelin is the primary hunger hormone, produced by the empty stomach. It drives hunger, stimulates dopamine release (creating food-seeking behavior), and enforces the hypothalamic weight set-point. In people with obesity, ghrelin stays elevated even when there is plenty of stored body fat, while the hypothalamus has become resistant to leptin (the satiety signal from fat tissue). The result: persistent hunger that does not reflect actual caloric need.

    When caloric restriction is sustained, the body mounts a three-part defense:

    1. Ghrelin rises (driving more hunger)
    2. Resting metabolic rate drops (burning fewer calories at rest)
    3. Spontaneous physical activity decreases (conserving energy without conscious awareness)

    That is not a failure of willpower. It is an adaptive physiological response executing a defense strategy. The set-point the hypothalamus is defending is not a number you chose. And it is not one you can override through discipline alone.

    “Ghrelin concentrations paradoxically decrease after gastric bypass surgery, despite the stomach being empty more of the time.”

    That one sentence reframes bariatric surgery entirely. Bariatric surgery works (and produces durable results) not primarily by restricting food intake, but by resetting the hormonal thermostat. GLP-1 receptor agonist medications work the same way: they mimic the gut’s own satiety hormones and shift what the hypothalamus is defending. Neither is “cheating.” Both are working at the level where the problem actually lives.

    What Makes This Book Different from Other Hormone Books

    A lot of hormone books on the market are written by functional medicine practitioners, coaches, or journalists. They tend to focus on a subset of hormones (usually estrogen, progesterone, and thyroid) and emphasize protocols: what to eat, what to supplement, what to test.

    Nieuwdorp is none of those things. He is a practicing endocrinologist with a research background, and this is a medically rigorous hormone book written for a general audience in a way that very few are. A few things set it apart:

    Historical narrative. Each hormone chapter is partly a history of how that hormone was discovered (the story of insulin’s discovery in 1921, the cortisol experiments, the early testosterone research). It grounds each concept in the actual scientific process and makes the mechanisms memorable.

    The full spectrum of hormones. Most hormone books skip oxytocin, growth hormone, ADH, parathyroid hormone, and the gut peptides. Nieuwdorp covers them all, which matters because the interactions are the whole point. You cannot understand why stress disrupts your period without understanding the hypothalamic-pituitary-adrenal axis and its relationship to GnRH. You cannot understand why your gut matters for metabolic health without understanding GLP-1 and its relationship to insulin sensitivity.

    Calibrated caution about self-treatment. Nieuwdorp writes: “It’s clear that you can’t replace or even simulate the body’s own functions by administering hormones. Playing around with hormone preparations yourself can also be dangerous, especially without medical supervision.” For a book that could easily have pitched the opposite message, this is worth noting. The endocrine system’s complexity is precisely why hormone intervention requires clinical oversight.

    What it does not offer is a protocol. Nieuwdorp is more interested in mechanism than prescription. Readers who want the “what to do” alongside the science will need companion books. The related books table below has suggestions.

    Is The Power of Hormones Worth Reading?

    Read this if you have been told your labs are normal while feeling anything but, you want the actual mechanistic explanation for why weight loss gets physiologically harder over time, you are using a GLP-1 medication and want to understand why it works, or you are someone who thinks in systems and wants the full picture before making any decision about your hormonal health.

    Skip it if you want a step-by-step protocol, a supplement list, or a dietary framework. Nieuwdorp is a scientist, not a health coach, and the book reflects that completely.

    One caveat: The density is real. Some chapters (the history sections especially) move slowly, and readers who want a quicker route to the weight-relevant material can focus on chapters 5 (obesity and hunger) and 6 (gut and metabolism) without losing much. The payoff for reading straight through is the cumulative sense of how deeply interconnected every hormone system is, and it requires patience to get there.

    Books Like The Power of Hormones

    BookAuthorBest For
    It’s Your HormonesGeoffrey RedmondReaders who want clinical depth on female sex hormones specifically
    The Hormone MythRobyn Stein DeLucaReaders skeptical of hormone-blame narratives; a useful counterweight
    Thinking, Fast and SlowDaniel KahnemanFor readers who like dense, evidence-heavy science books on how systems shape behavior
    The XX BrainLisa MosconiBrain imaging data on what estrogen loss does to cognition; extends Nieuwdorp’s perimenopause chapters
    Hormone IntelligenceAviva RommThe protocol-forward complement: where Nieuwdorp explains the mechanism, Romm prescribes the intervention

  • The Hormone Boost by Natasha Turner: Summary, Key Ideas & Review

    Book in one sentence: A naturopathic doctor who spent decades managing her own thyroid disease and PCOS maps six fat-loss hormones and shows why most diets fail at the hormonal level before they ever fail at the calorie level.

    What Is The Hormone Boost About?

    In 1993, Natasha Turner came home from work crying, unable to process what people were saying to her, convinced she had a neurological disease. She was gaining weight fast. She was sleeping sixteen hours a day and still exhausted. Doctors had been missing her hypothyroidism for years because she appeared slim. When her TSH finally came back above 25 (optimal is under 2), she started treatment and felt like a different person within a week. That experience became the lens through which she built her entire clinical practice.

    Turner is a naturopathic doctor based in Toronto, a three-time bestselling author, and founder of Clear Medicine Wellness Boutique. The Hormone Boost is the third book in her Hormone Diet series, and it’s the most practical of the three. The core argument is simple: most weight loss failures are hormone failures, not willpower failures. Six hormones drive fat loss directly, and the behaviors people adopt to lose weight (severe calorie restriction, long cardio sessions, skipping sleep) are often the exact behaviors that suppress those hormones.

    The book covers nutrition, exercise, sleep, and supplementation through a hormonal lens. Turner does not write like an academic. She writes like a clinician who has heard thousands of patients describe the same frustrating experience: doing everything right and getting nowhere. That familiarity gives the book its usefulness.

    The Six Hormones Turner Wants You to Optimize

    Turner’s “fat-loss six” are testosterone, growth hormone, thyroid, adiponectin, adrenaline, and glucagon. Each gets its own chapter. Each chapter explains what the hormone does, what suppresses it, and what restores it. A few stand out as genuinely clarifying.

    Thyroid is the gate, not just a piece of the puzzle. Thyroid hormone increases cellular sensitivity to every other hormone in the stack. When thyroid function is low, even a good testosterone or cortisol profile underperforms because the cells can’t respond to it. Turner targets TSH under 2, with free T3 toward the high end of normal. Standard care flags TSH above 4.5 as hypothyroid. For anyone who has been told their thyroid is “fine” while dealing with fatigue, weight gain, hair loss, and brain fog, that gap is where this book lives.

    Growth hormone requires architecture, not supplements. GH is released during deep sleep in total darkness, in a window that lasts about thirty minutes. Eating within two to three hours of bedtime prevents the core temperature drop that triggers the cascade. Light in the bedroom prevents melatonin release. Chronic stress suppresses GH directly. Turner’s data point on fasting and GH is striking: a twenty-four-hour fast produces roughly a 1,300% surge in women. That’s not a supplement effect. The conditions are behavioral, and most people are accidentally preventing GH release every night.

    Adiponectin rewards you more the more you have to lose. Adiponectin is produced by fat cells but paradoxically burns fat by improving insulin sensitivity. The inverse relationship between adiponectin and body fat creates a useful reframe: the exercise dividend is proportionally larger at higher body fat percentages. Key boosters include omega-3 fatty acids (14-60% increase in some studies), fiber with every meal (60-115% increase), and green coffee bean extract before exercise. Food composition and timing matter here beyond calorie math.

    “A total lack of carbs can cause physical stress and elevate levels of the stress hormone cortisol, which can in turn lead to loss of muscle tissue and an increase in abdominal fat. Without carbs, testosterone plummets, leaving our libido flat and our muscles depleted.”

    Turner returns to cortisol in nearly every chapter because it suppresses almost every fat-burning hormone at once. High cortisol increases reverse T3 (which blocks thyroid), drops testosterone and DHEA, suppresses growth hormone, and drives carbohydrate cravings. The primary causes in her patient population: aggressive calorie restriction, cardio sessions over one hour, and insufficient sleep. The pattern is worth sitting with: the things people do to lose weight are often the things making weight loss harder.

    Why Strength Training Is the Centerpiece

    Turner’s workout protocol is three days of strength training, two to three days of walking or interval work, and one or two days of yoga. Each modality has a specific hormonal rationale. Strength training uniquely raises DHEA and testosterone. Endurance training alone does not produce the same effect. Interval training spikes adrenaline and growth hormone. Yoga lowers cortisol and improves insulin sensitivity. Walking raises adiponectin. Even music during exercise matters (independently raises serotonin and dopamine, per the research she cites).

    The over-one-hour caveat is the single most practical piece of advice in the exercise section. Sessions exceeding sixty minutes drop thyroid hormone for twenty-four hours and spike cortisol. A two-hour cardio session that feels productive is creating a hormonal environment that works against fat loss for the rest of the day. Turner recommends circuit training (no rest between exercises) as the highest hormonal return for time invested.

    For women losing weight who want to preserve or build muscle, this is the most relevant chapter in the book. The argument for lifting heavy isn’t aesthetic. It’s endocrine.

    What to Do With Carbs (Turner’s Answer Is Not What You’d Expect) {#what-to-do-with-carbs}

    Turner challenges the low-carb consensus directly, and her argument holds up better in 2026 than it did in 2016. Complete carbohydrate elimination raises cortisol, crashes testosterone, depletes serotonin (which requires carbohydrates for synthesis), and suppresses thyroid conversion. That’s the hormonal profile for fat storage, not fat burning.

    Her alternative is specific:

    • Protein at every meal (25-35 grams per sitting)
    • Starchy carbohydrates only at dinner (supports serotonin and melatonin production without spiking daytime insulin)
    • No starch at breakfast (a high-protein, no-starch first meal sets dopamine and glucagon levels for the entire day)
    • Fiber with every meal (raises adiponectin and slows glucose absorption)

    The breakfast recommendation is the one worth testing first. Turner argues it resolves afternoon cravings and energy crashes more reliably than any other single nutritional change. The mechanism is the dopamine-glucagon combination from a protein-heavy morning: it sets the hormonal tone before anything else has a chance to disrupt it.

    “When we cut calories drastically, we cause stress on our bodies, which increases our cortisol, which sabotages all our efforts. This stress hormone causes our appetite for comfort foods to surge, is associated with belly fat… and slows down our metabolism by suppressing our thyroid hormone.”

    One piece that’s less visible in the summary version: gut health is where Turner starts the whole program. Ninety percent of serotonin is made in the gut. T4 converts to active T3 in the gut. The preparation phase before any targeted hormone supplementation begins with gut repair (daily probiotics, fiber, magnesium at bedtime, IgG food sensitivity testing). The rest of the protocol works better when this foundation is in place.

    Is The Hormone Boost Worth Reading?

    Read this if you’ve had the experience of doing everything right and not losing weight, or if you suspect subclinical thyroid dysfunction and keep being told your labs are normal. Also worth reading if you’ve been doing chronic cardio and wondering why it’s stopped working.

    Skip it if you want a simple meal plan without the mechanistic explanation behind it. The hormone-by-hormone architecture is dense, and readers without some prior health literacy may find it overwhelming rather than clarifying.

    One caveat: Turner’s supplement protocol is aggressive and references her proprietary Clear Medicine product line throughout. The conflict of interest is worth naming. Many of the most impactful interventions in the book (protein timing, strength training, dark sleep environment, gut health) require no supplements at all. The behavioral framework is strong. The supplement section should be read with more skepticism than the rest.

    The book has aged well. The functional medicine framing that felt niche in 2016 has since become mainstream, and the gut microbiome research Turner cited has largely held up. Her core argument that weight loss is a hormone optimization problem rather than a calorie math problem has found an unexpected validator: GLP-1 medications work precisely by correcting hormonal signaling, not by restricting calories.

    Books Like The Hormone Boost

    BookAuthorBest For
    The Hormone FixAnna Cabeca, DOMenopause-focused hormonal reset with more attention to estrogen and progesterone
    Women Food and HormonesSara Gottfried, MDKeto protocol adapted for women’s hormonal cycles
    Strong CurvesBret ContrerasStrength training program with the research on muscle-building for women
    Lean and StrongShannon HillisResistance training + nutrition specifically for fat loss without chronic cardio
    Hormone IntelligenceAviva Romm, MDBroader hormonal map with deeper focus on reproductive hormones and root causes

  • It’s Not You, It’s Your Hormones by Nicki Williams: Summary, Key Ideas & Review

    Book in one sentence: A UK nutritional therapist walks women through the four hormones wrecking their health after 40, and shows how food and lifestyle can actually fix them.

    What Is It’s Not You, It’s Your Hormones! About?

    Picture this: you’re standing at the kitchen sink, too depleted to think, and your seven-year-old comes in to show you a drawing she made at school. You snap at her. Her face falls. She says, “Why are you always so grumpy, Mummy?” That moment happened to Nicki Williams in January 2007. She was 42, exhausted, gaining weight around her middle despite trying every diet, and had just left her GP’s office holding a Prozac prescription she didn’t want.

    Williams sat in her car and cried. Then she called her father (also a doctor, one who had long since moved toward functional medicine) and he said: “Don’t worry, Nick. It’ll be your hormones.” That conversation sent her back to school, through a four-year qualification at the Institute of Optimum Nutrition, and eventually into a clinical practice built around the population she had become: women over 40 who feel terrible and keep being told their bloodwork is fine.

    It’s Not You, It’s Your Hormones! is the book that came out of that journey. Williams is not an academic, and she writes like a practitioner, not a researcher. What she offers is a clear, accessible framework for understanding why perimenopause-era symptoms (fatigue, abdominal weight gain, brain fog, mood swings, broken sleep) happen at a physiological level, and what food and lifestyle changes can do about them. The UK origin means NHS references and British supplement brands appear throughout, but the underlying physiology translates cleanly anywhere.

    Why Am I Gaining Weight When Nothing Has Changed?

    That question drives most of the women who pick up this book. They haven’t changed what they eat. They’re not sedentary. They’re doing all the things that used to work, and the scale is still creeping up, specifically around the middle, in a way it never used to.

    Williams’s answer centers on cortisol and insulin working together against you. Cortisol, the stress hormone, has a direct effect on abdominal fat storage: abdominal fat contains four times more cortisol receptors than fat anywhere else in the body. When cortisol is chronically elevated (from any form of stress, including poor sleep, refined carbohydrates, or skipped meals), it mobilizes blood glucose. That glucose spike triggers insulin. Insulin is the fat-storage signal, and with blood sugar elevated, it’s chronically activated regardless of how little you’re eating.

    “Not only do we have four times more cortisol receptors in our abdominal fat than any other part of the body, but cortisol also stimulates appetite — sugar and carbs are vital when you need energy to run from that lion.”

    The practical consequence is brutal: calorie restriction often makes this worse. A severe cut signals famine to the brain, which triggers more cortisol, which slows metabolism and breaks down muscle for glucose, which produces powerful cravings for sugar and refined carbohydrates. Williams draws on Zoe Harcombe’s work to note that 98% of people either fail to lose weight on a calorie-controlled diet or regain what they lost. The mechanism itself produces those outcomes.

    The loop she describes is also behind the 3am wake-up and the afternoon crash. Blood sugar drops overnight, cortisol surges to correct it, and you’re wide awake. The morning exhaustion that follows sends you to coffee and carbohydrates, blood sugar spikes and crashes again, and the cycle restarts. Understanding that this is a physiological cascade, not a willpower failure, is the orientation shift the book is built around.

    What Is the Happy Hormone Code?

    Williams organizes her intervention into four steps: Eat, Rest, Cleanse, Move. Each maps to a specific hormonal lever. The whole system is built around what she calls the “Feisty Four”: cortisol, insulin, thyroid, and estrogen/progesterone. These four hormones interact so tightly that dysfunction in one tends to cascade into the others.

    A few things worth knowing from each step:

    Eat reframes food as hormonal information rather than calories. The practical targets are protein at every meal, low-glycemic-load carbohydrates, cruciferous vegetables (which contain indole-3-carbinol to support estrogen metabolism through the liver), healthy fats, and 35 grams of fiber daily. Ground flaxseeds get specific attention: two tablespoons a day, because flaxseeds contain lignans at roughly 100 times the concentration of any other food source, and lignans bind excess estrogen for elimination via the gut. A minimum 12-hour overnight fast is also recommended for insulin management.

    Rest addresses cortisol directly. Williams is clear that stress management isn’t optional, it’s the foundational intervention. Consistent sleep before 11pm, diaphragmatic breathing (five-count rhythm, ten repetitions), and screens off one hour before bed are her baseline. Adaptogenic herbs like ashwagandha and rhodiola get a mention as cortisol modulators, and magnesium glycinate at bedtime comes up repeatedly as a first-line supplement because magnesium is rapidly depleted by stress and supports both cortisol regulation and sleep.

    Cleanse focuses on xenoestrogens, the environmental chemicals from plastics, pesticides, and personal care products that mimic estrogen in the body. Williams recommends switching to glass and stainless steel where possible, choosing organic produce for high-pesticide items, and supporting the liver and gut as the main clearance routes for excess estrogen. The cruciferous vegetable recommendation reappears here.

    Move reframes the exercise question for cortisol-depleted women. More cardio is not better. Williams advocates 30-minute daily walks, brief HIIT sessions (15 minutes, two or three times a week, because short HIIT raises growth hormone and improves insulin sensitivity without adding significant cortisol load), resistance training, and yoga or Pilates for their cortisol-lowering effects specifically.

    One of the more useful distinctions in the book is Williams’s separation of estrogen dominance from low estrogen. These are two different perimenopausal states that require different responses. Estrogen dominance (too much estrogen relative to declining progesterone, common from the mid-30s onward) produces heavy or painful periods, breast tenderness, PMS, bloating, and conditions like fibroids. Low estrogen (the later perimenopausal and menopausal state) produces hot flushes, night sweats, dry skin, and memory changes. Using phytoestrogen support for the dominance phase can worsen it. The framework to tell them apart is one of the book’s more distinctive contributions.

    What Does “Normal” Lab Work Actually Miss?

    A significant portion of Williams’s readership has already been to their GP, had blood drawn, been told everything looks fine, and left no closer to understanding why they feel awful. The testing chapter is written for them.

    Williams draws a sharp line between “normal” (anywhere within a reference range) and “optimal” (in the range where symptoms actually resolve). The thyroid example is the clearest illustration. The NHS upper limit for TSH is 5.0 mU/L. Many integrative practitioners treat 2.5 mU/L as the functional upper limit. A result of 4.2 is entirely “normal” by conventional standards and may prompt nothing further, while a patient at that level could be functionally hypothyroid.

    “There is often a huge difference between someone with optimal TSH and someone with a level that is just within range. It will most often show up in their symptoms. If you ask me, I’d be wanting OPTIMAL levels not ‘normal’ levels.”

    Standard thyroid panels measure only TSH, which is the pituitary’s signal to produce thyroid hormone, not whether the body is converting that hormone into its active form (T3) or whether the cells can receive it. Williams recommends requesting TSH, free T4, free T3, Reverse T3, and TPO antibodies (the last one for Hashimoto’s autoimmune thyroiditis, which she notes accounts for roughly 80% of hypothyroid cases). She also introduces the Barnes Basal Temperature Test, six consecutive mornings of underarm temperature readings before getting up, as a low-cost screen: consistent readings below 36.6°C suggest low thyroid function even with normal labs.

    For adrenal function, she recommends saliva cortisol testing over serum testing, because saliva captures cortisol at multiple points through the day (including the critical morning cortisol awakening response) rather than a single snapshot. For sex hormones, she specifies timing: days 19-20 of the cycle, when progesterone should be at its peak and the estrogen-to-progesterone ratio is most informative. A woman tested on day 5 or day 28 gets a picture that tells a very different story.

    Is It’s Not You, It’s Your Hormones! Worth Reading?

    Read this if you’re between roughly 35 and 55, experiencing the cluster of symptoms Williams describes (fatigue that doesn’t resolve with sleep, abdominal weight gain, worsening PMS or cycle changes, mood instability, brain fog), and especially if you’ve had normal labs and been told there’s nothing wrong. Also useful if you’re a health coach or practitioner working with this population and want a clear client-education framework.

    Skip it if you want a heavily cited research text or if you’re primarily post-menopausal and focused on HRT decisions. The HRT chapter is balanced and honest about the limits of Williams’s expertise in that area, but it’s thin coverage for someone who needs it to be the main event.

    One caveat: the book was published in 2017, the research base for several claims (especially around HIIT for women over 40 and some of the adrenal fatigue framing) has evolved since then, and the UK-specific medical references require translation for anyone outside the NHS. Williams does not always distinguish clearly between interventions with strong evidence and those with more preliminary or clinical-observation-only support. Take the supplement protocols as a starting point for a conversation with a practitioner, not a prescription.

    Books Like It’s Not You, It’s Your Hormones!

    BookAuthorBest For
    Happy HormonesAngelique VermeulenWomen who want a broader hormonal overview beyond perimenopause
    The Hormone ShiftTasneem BhatiaDeeper clinical detail with a heavier research base
    Hormone IntelligenceAviva RommIntegrative MD perspective with stronger evidence citations
    The Perimenopause SolutionDr. Shahzadi HarperUK-based GP who covers HRT and lifestyle together
    Is It Me or My Hormones?Marcelle PickSimilar audience, more emphasis on the emotional and relational side

  • Happy Hormones by Kristy Vermeulen: Summary, Key Ideas & Review

    Book in one sentence: A nutritionist’s practical, hormone-by-hormone guide to understanding why you feel off and what food and lifestyle changes can actually help.

    What Is Happy Hormones About?

    You go to your doctor exhausted, puffy, irritable, and stuck at the same weight despite doing everything right. The labs come back normal. Nothing is wrong. Here, maybe try an antidepressant.

    Kristy Vermeulen wrote Happy Hormones for exactly that moment. She is a nutritionist who specializes in women’s hormonal health and who has been through her own version of the frustrating cycle: high cortisol, estrogen excess, progesterone deficiency, the whole cascade. The book is organized around a core premise she states plainly in the introduction: “Though these symptoms may be common, they are not normal.” That distinction, common versus normal, is doing a lot of work. It is the moral center of everything that follows.

    The book covers six major hormones (estrogen, progesterone, cortisol, thyroid, DHEA, and testosterone) and gives each a dedicated chapter with its own symptom list, food recommendations, and lifestyle changes. There is a self-assessment questionnaire up front that routes you to whichever chapters apply to you. You do not need to read it cover to cover to get something useful out of it.

    Where does it sit on the crowded shelf of hormone books? Less clinical than Aviva Romm’s work, less protocol-heavy than Sara Gottfried’s. Think of it as the book you read before those books, the one that gives you a map and vocabulary before you go deeper. For anyone who suspects hormones are involved in their weight struggles but does not know where to start, this is a reasonable first stop.

    How Does Vermeulen Organize Hormone Advice?

    Most hormone books give you a program. Vermeulen gives you a ladder.

    Every chapter in the book follows the same six-step hierarchy, ordered from least to most interventional: (1) diet modification, (2) lifestyle changes, (3) nutritional supplements, (4) herbal support, (5) homeopathic remedies, and (6) bioidentical hormone replacement. The order is intentional. The idea is that you work through the foundational steps before reaching for anything more involved, and many women improve substantially at steps one through three.

    This is actually a useful corrective to both conventional medicine (which often skips to pharmaceuticals) and the wellness industry (which often skips to supplements). The framework implies that your body is trying to regulate itself and will do so if you remove obstacles and provide the raw materials it needs. That is a reasonable place to start.

    One honest caveat: step five is homeopathy, which has no plausible mechanism and does not perform above placebo in controlled research. Its inclusion, presented without any caveats, is the book’s main credibility problem. Skip that step. Everything around it, the dietary foundations, the herbal support, and the bioidentical hormone discussion, is on much firmer ground.

    The six-step structure is also what makes this book modular. A woman dealing primarily with thyroid symptoms can read the relevant chapters and leave with something concrete. Someone in perimenopause can go straight to the estrogen and progesterone chapters. The questionnaire at the front tells you where to go.

    Which Hormones Does the Book Cover?

    Estrogen and the Environmental Load

    Vermeulen’s estrogen chapter does something most books in this space do not: it makes the environmental argument concrete. Xenoestrogens (synthetic chemicals in plastics, pesticides, conventional cosmetics, and cleaning products) accumulate in the body and add to the total estrogenic load. The chapter gives a workable reduction protocol:

    • Swap plastic food containers and water bottles for glass or stainless steel
    • Check cosmetics and personal care products for phthalates and parabens (the EWG Skin Deep database is her recommended tool)
    • Choose organic, hormone-free meat and dairy when possible
    • Switch to green cleaning products
    • Filter tap water rather than relying on plastic-bottled water

    This matters because estrogen excess is not just about what your ovaries are doing. It is also about what your liver is metabolizing and what your environment is contributing. That is a more complete picture than most women receive from a standard gynecology appointment.

    Cortisol and Why Stress Affects Everything

    The cortisol chapter is where the cascade logic becomes clearest. Chronic cortisol elevation does not stay in its lane. It competes with progesterone for the same upstream building block (pregnenolone), suppresses thyroid production, and accelerates DHEA depletion. What shows up as PMS, thyroid sluggishness, or total burnout may all be downstream of the same driver: sustained stress.

    Vermeulen’s symptom picture for high cortisol reads like a description of a significant portion of working-age women: anxiety, insomnia, abdominal weight gain, wired-but-tired sensation, and cravings for sugar and carbohydrates (the body seeking fast fuel in a perceived state of threat). The herbs she recommends for this pattern, ashwagandha chief among them, have accumulated a solid evidence base since the book’s original publication. Multiple controlled trials have shown ashwagandha reduces salivary cortisol and self-reported stress, which places it in a different category from most of the herbal recommendations in the book.

    “Cortisol is designed to be a short-term process, not for the days, months, and years that chronic stress is today.”

    Thyroid and the TSH Problem

    This section is pointed and, for many women, the most practically useful part of the book. The current conventional reference range for TSH runs from 0.45 to 4.5 uIU/mL. Vermeulen argues that this range is too wide and that hypothyroid symptoms often appear when TSH exceeds 2.0. A woman with a TSH of 3.8 who is exhausted, cold, constipated, and stuck at her weight is told her thyroid is normal. She is not getting the full picture.

    “The reference range for TSH is currently set from 0.450–4.500 uIU/mL. This range is too wide, and anyone with a TSH greater than 2 uIU/mL can be experiencing hypothyroid symptoms.”

    She also addresses the T4-only treatment problem. Standard levothyroxine provides only T4, which the body must convert to active T3, and that conversion requires zinc, selenium, and a functioning liver. When conversion is impaired, T4-only treatment does not resolve symptoms. Desiccated thyroid (which provides both T3 and T4 directly) is her clinical preference for most confirmed cases.

    Why Do Hormones Make Weight Loss So Hard?

    For anyone who has followed the rules, reduced calories, exercised consistently, and still not lost weight, this book offers a few useful lenses.

    Estrogen excess and fat distribution. High estrogen relative to progesterone promotes fat storage in hips, thighs, and belly, increases water retention, and can make weight loss resistant to calorie restriction alone. Addressing the root cause (xenoestrogen load, liver metabolism, stress-driven progesterone depletion) targets the mechanism rather than just the symptom.

    The cortisol-food loop. Elevated cortisol raises blood glucose, drives insulin resistance, and creates cravings for fast carbohydrates. It also disrupts sleep, which then compounds hunger hormone dysregulation through a separate pathway. Vermeulen does not use emotional eating language, but the physiology she describes is one of the most common underlying drivers of it.

    Subclinical hypothyroidism. A slowed metabolism is real and measurable at TSH levels that conventional labs consider normal. Women who eat cleanly, exercise, and still cannot lose weight are sometimes dealing with this without knowing it. It is worth asking harder questions at your next lab appointment.

    Routine as metabolism. This one is underrated and shows up consistently across every chapter. Vermeulen recommends a fixed wake time, consistent meal timing, and a regular movement window for every hormonal imbalance, because the circadian rhythm governs cortisol, insulin, melatonin, and growth hormone. Irregular scheduling is a stressor on its own. Chronobiology research since publication has reinforced this point considerably.

    One of her case examples ends with a patient saying the supplement protocol was fine but the thing that actually moved the needle was establishing a consistent daily schedule. That kind of quiet finding, buried in a case example rather than on the cover, is worth paying attention to.

    Is Happy Hormones Worth Reading?

    Read this if you suspect hormones are affecting your weight, energy, or mood and want a readable, organized starting point before working with a practitioner. Also useful if you are in perimenopause, navigating PMS that feels out of proportion, or curious about bioidentical hormones and want a balanced, non-scary introduction.

    Skip it if you need citations and want to evaluate the evidence yourself (Sara Gottfried’s work is better suited for that), or if you want a single authoritative protocol rather than a flexible framework.

    One caveat: The supplement dosages should not be self-prescribed from the printed pages. Some are well-supported, some are extrapolated from small studies, and the book does not signal which is which. Take the framework to a practitioner who can run actual labs and dose accordingly.

    Books Like Happy Hormones

    BookAuthorBest For
    Hormone IntelligenceAviva RommMore clinical depth, stronger citations, good for PCOS and perimenopause
    Healthy HormonesMagdalena WszelakiPractical food-first approach with meal plans
    The Happy Hormone GuideShannon LeparskiPlant-based angle, cycle-syncing focus
    The Hormone FixAnna CabecaKeto-alkaline diet meets hormone balance
    Women Food and HormonesSara GottfriedResearch-heavy, best for readers who want clinical detail