Good Energy

Good Energy

In Good Energy, Dr. Casey Means unveils a radical but intuitive idea: the root of most modern chronic diseases isn’t genetics or aging—it’s broken cellular energy. She introduces the concept of “Good Energy” as a state of optimized metabolic health where our cells can efficiently produce energy, fueling everything from clear thinking and immunity to emotional resilience and longevity. Drawing from her background as a Stanford-trained surgeon-turned-metabolic health evangelist, Means calls for a total overhaul of how we think about health, from reactive sick care to proactive energy enhancement.

The book blends science, memoir, and practical advice to connect the dots between seemingly unrelated conditions—like obesity, diabetes, autoimmune disease, cancer, depression, and burnout—and a common culprit: dysfunctional mitochondria. It criticizes the medical-industrial complex for treating symptoms rather than root causes, and empowers readers to reclaim their vitality through food, sleep, light exposure, stress resilience, and movement.

Means’ message is hopeful: by aligning our daily habits with our biological design, we can generate radiant health and resist disease before it begins. Her “Good Energy” framework shows readers how to cultivate vibrant metabolic health to live longer, think clearer, and feel better every day.

“We don’t need more medicine. We need more energy.” – Casey Means

Good Energy

Key Insights

Metabolism Is the Root of Modern Disease

At the heart of Good Energy lies a simple but profound assertion: metabolic dysfunction—poor cellular energy production—is the unifying cause behind most chronic illnesses. Whether it’s type 2 diabetes, cancer, Alzheimer’s, depression, or even autoimmune conditions, Dr. Means contends that these seemingly unrelated conditions are symptoms of the same underlying issue: damaged, energy-starved cells.

The book begins with the personal story of Dr. Means’ mother, who experienced a cascade of “normal” age-related diagnoses—hypertension, high cholesterol, prediabetes—until she suddenly died from pancreatic cancer. Her medical trajectory followed the standard path: symptom, prescription, repeat. No one asked why her cells were breaking down. This experience catalyzed Dr. Means’ departure from conventional surgery and led to her mission: to address the root causes of illness rather than manage downstream symptoms.

Means explains that healthy mitochondria—our cells’ energy factories—are crucial for everything from immunity to cognition. When mitochondria are damaged by poor nutrition, stress, toxins, or sedentary lifestyles, energy production plummets. The result? Cells malfunction. And when cells malfunction, disease emerges.

This framework—what she calls the “Energy-Centric Health Model”—challenges the traditional siloed view of medicine. Instead of separate experts for cardiology, endocrinology, psychiatry, and oncology, she argues for a unified model that sees cellular energy as the foundation of all health. The book urges readers to ask a different question than “What drug should I take?”—instead, ask “Why are my cells struggling to function?”

The implications are massive. This model not only demystifies the rise of chronic illness, but also gives people a tangible path toward healing. Dr. Means’s argument flips the dominant health narrative on its head: It’s not just about preventing disease, but optimizing energy so we can live our most vibrant, purposeful lives.

“Bad energy is the soil in which all modern diseases grow.”

The Medical System Treats Symptoms, Not Causes

A core critique in Good Energy is that the healthcare system has become an industry of downstream symptom management rather than upstream prevention. Dr. Means pulls back the curtain on a medical-industrial complex driven more by profit than healing.

She outlines how medical training primes doctors to specialize in specific organs or symptoms—heart disease, skin rashes, mood disorders—while rarely teaching about metabolism, mitochondria, or nutrition. Even worse, physicians are financially incentivized to prescribe pills and perform procedures, not to teach lifestyle transformation or address root causes.

“There are financial incentives for sickness, and few for sustained health.”

This reductionist model fragments care and ignores the interconnectedness of the human body. For example, high blood pressure and insulin resistance are often treated separately, despite their common root in metabolic dysfunction. Patients may leave a doctor’s office with prescriptions for statins, ACE inhibitors, and SSRIs—each for different symptoms, none addressing the cause.

Means also exposes how corporate food, pharmaceutical, and insurance industries perpetuate this dysfunction. Junk food companies profit from ultra-processed, mitochondria-damaging products. Pharmaceutical companies then profit from treating the diseases this food causes. And insurers profit from a high-cost, chronic care system. It’s a vicious loop.

But Dr. Means insists this is not a conspiracy—it’s a consequence of misaligned incentives and a deeply entrenched system. Her call to action is for patients to become empowered participants, not passive recipients of care.

Importantly, Good Energy isn’t anti-doctor or anti-medicine—it’s a rallying cry for re-centering healthcare around prevention, education, and energy optimization. By seeing the body as an energy system instead of a collection of parts, we unlock new possibilities for healing, resilience, and vitality.

Your Biology Is Wired for Vitality

In a world of chronic stress and fatigue, it’s easy to believe that low energy is just part of modern life. But Dr. Means argues that our natural state is vitality. If we support our biology—especially our mitochondria—we can unlock boundless, sustainable energy.

What derails us is modern life: processed food, artificial light, disrupted sleep, chronic stress, environmental toxins, and too little movement. These factors overload our cells and impair mitochondrial function, reducing energy output. The result? Brain fog, weight gain, mood disorders, inflammation, and accelerated aging.

The book reclaims a powerful truth: our bodies are not broken—they’re confused. And they’re incredibly responsive to change. By aligning with the biological inputs we evolved for—nutrient-dense food, natural light-dark cycles, movement, and emotional safety—we can regain metabolic flexibility and vibrant energy.

Means emphasizes that “energy” isn’t just about physical stamina; it’s the foundation of every system in the body. When cells produce energy efficiently, immunity improves, mood stabilizes, cognition sharpens, and hormones balance. Conversely, low energy manifests as disease.

The good news? Our bodies are remarkably resilient. Even small shifts in daily habits—like walking after meals, reducing sugar, prioritizing sleep, or eating whole foods—can have outsized effects on mitochondrial function.

Ultimately, Means reframes energy as more than a health metric—it’s a spiritual and emotional resource. Good Energy isn’t just about feeling good; it’s about fully engaging with life.

Tactics

Master the Six Pillars of Good Energy Eating

Dr. Means introduces six principles for eating to support cellular energy. These are not gimmicky diet rules—they are metabolic health fundamentals that reduce inflammation, stabilize blood sugar, and optimize mitochondrial performance:

  1. Eliminate Ultra-Processed Foods: These spike blood sugar, overload mitochondria, and drive inflammation. Look for whole, unrefined foods without added sugars or industrial seed oils.
  2. Focus on Nutrient Density: Prioritize foods rich in magnesium, omega-3s, B vitamins, antioxidants, and amino acids—especially dark leafy greens, nuts, seeds, organ meats, wild fish, and colorful produce.
  3. Balance Your Blood Sugar: Use tools like continuous glucose monitors (CGMs) to identify which foods cause energy crashes. Pair carbs with fiber, fat, and protein to flatten glucose spikes.
  4. Prioritize Healthy Fats: Avocados, olive oil, nuts, seeds, and pasture-raised animal fats support hormone health and stable energy.
  5. Choose Regeneratively Grown Food: Beyond personal health, food from healthy soil is richer in nutrients and supports a sustainable food system.
  6. Eat Intentionally: Savor meals without screens. Chew thoroughly. Avoid late-night snacking, and eat meals that leave you feeling energized—not sluggish.

Dr. Means emphasizes personalization. Tools like food journals, CGMs, and blood tests can help uncover hidden sensitivities and empower you to make data-informed choices. Instead of following generic advice, you’ll learn to decode your own biofeedback.

The payoff? Fewer energy crashes, less brain fog, more stable moods, improved weight regulation, and even disease reversal. Food isn’t just fuel—it’s information that tells your body how to operate.

“Every bite you eat is either feeding disease or fueling vitality.”

Sync Your Biology with Nature’s Rhythms

Modern life has disconnected us from the natural cues our bodies rely on—light, movement, temperature, and circadian rhythms. Dr. Means shows how reclaiming these primal rhythms can radically boost metabolic health.

  1. Light: Natural light sets your circadian rhythm, impacting sleep, hormones, and metabolism. Aim for sunlight within 30 minutes of waking and reduce artificial light exposure after sunset. Use blue-light-blocking glasses and dim lights at night.
  2. Sleep: Inconsistent or poor sleep impairs insulin sensitivity and mitochondrial repair. Go to bed and wake up at the same time every day. Limit caffeine after noon, avoid screens before bed, and use sleep trackers for accountability.
  3. Meal Timing: Eating late at night disrupts your metabolic rhythm. Instead, adopt a 12-hour eating window (e.g., 8 a.m.–8 p.m.) or experiment with time-restricted eating. Give your body time to digest and repair.
  4. Movement: Sedentary behavior damages mitochondrial function. Aim for light movement throughout the day—walk after meals, stretch, take stairs, squat while waiting for water to boil.
  5. Temperature: Expose your body to natural temperature variation. Cold showers, saunas, and spending time outdoors teach your mitochondria adaptability, increasing resilience.
  6. Nature: Contact with nature—sunlight, soil, plants—has measurable effects on blood sugar, mood, and inflammation. It’s not just pleasant—it’s medicinal.

By rewilding your daily environment, you remind your cells of their evolutionary blueprint. And your body responds by working better—with fewer inputs and more output.

Build Habits that Compound Energy Over Time

Good Energy emphasizes that change doesn’t require a complete life overhaul—just small, consistent tweaks. Drawing from behavioral science, Dr. Means outlines practical tools to lock in better energy habits:

  1. Habit Stacking (James Clear): Link a new behavior to an existing habit. Example: After brushing your teeth, do 10 squats or take a moment to practice gratitude.
  2. Tiny Habits (BJ Fogg): Start small. Instead of “go to bed earlier,” try “put on blue-light glasses at 9 p.m.” Build momentum with micro-wins that snowball into major transformation.
  3. Self-Monitoring: Use CGMs, HRV trackers, sleep wearables, or food journals to observe how behaviors affect your energy. Real-time feedback boosts motivation and insight.
  4. Accountability Systems: Partner with a friend, coach, or online community. Share goals and celebrate wins together to reinforce new patterns.
  5. Rituals & Environment Design: Make energy-supportive choices automatic. Leave your phone in another room at night. Place workout clothes beside your bed. Keep filtered water on your desk. Create a life where the default is health.
  6. Emotional Resilience: Fear, shame, and chronic stress all tax your metabolic system. Practices like journaling, therapy, breathwork, and community support regulate the nervous system and restore energy balance.

Ultimately, the most powerful medicine isn’t found in a pharmacy—it’s found in your daily choices. As Dr. Means writes: “Energy begets energy.” When you feel better, you do better. And when your cells thrive, so do you.

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