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.

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• What Is The Hormone Boost About?
• The Six Hormones Turner Wants You to Optimize
• Why Strength Training Is the Centerpiece
• What to Do With Carbs (Turner’s Answer Is Not What You’d Expect)
• Is The Hormone Boost Worth Reading?
• Books Like The Hormone Boost

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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.

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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.

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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.

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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.

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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.

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Books Like The Hormone Boost

Book	Author	Best For
The Hormone Fix	Anna Cabeca, DO	Menopause-focused hormonal reset with more attention to estrogen and progesterone
Women Food and Hormones	Sara Gottfried, MD	Keto protocol adapted for women’s hormonal cycles
Strong Curves	Bret Contreras	Strength training program with the research on muscle-building for women
Lean and Strong	Shannon Hillis	Resistance training + nutrition specifically for fat loss without chronic cardio
Hormone Intelligence	Aviva Romm, MD	Broader hormonal map with deeper focus on reproductive hormones and root causes