“Healthy” is a marketing word. What it means in biological terms is a system maintaining homeostasis: regulated blood glucose, low systemic inflammation, functional insulin sensitivity, adequate sleep architecture, an intact gut barrier. Most of what the food, supplement, and pharmaceutical industries sell as “health” targets the appearance of these conditions — or suppresses their downstream symptoms — without addressing the upstream causes.
This page is a working list of the people and books that have changed how I think about the gap between not sick yet and actually healthy. It leans heavily on functional medicine, metabolic research, and the emerging science of healthspan rather than lifespan. It is not a prescription — it is a map of the territory for people who want to read the primary sources rather than wait for the standard model to catch up.
The Functional Medicine Framework#
Functional medicine treats the body as a web of interconnected systems rather than a collection of isolated organs managed by separate specialists. Where conventional medicine asks what disease you have, functional medicine asks why the system has gone out of balance — looking for upstream causes: gut permeability, hormonal dysregulation, chronic low-grade inflammation, mitochondrial dysfunction, nutrient insufficiency, toxin load.
The Institute for Functional Medicine (IFM) is the main professional body training and certifying practitioners. The resources below are the most useful entry points:
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| Dr. Mark Hyman | Head of Strategy at Cleveland Clinic’s Center for Functional Medicine. His YouTube channel is the highest-volume accessible entry point to functional medicine thinking. Books: The Blood Sugar Solution, Food: What the Heck Should I Eat?, Young Forever. |
| Dr. Casey Means | Good Energy (2024): metabolism as the operating system of health, continuous glucose monitoring as the diagnostic tool, real food as the primary intervention. The clearest current synthesis of the whole argument. |
| Dr. Jeffrey Bland | The founder of functional medicine as a formal discipline and co-founder of the IFM. The Disease Delusion (2014) is the foundational text explaining why the conventional organ-by-organ model fails for chronic disease. |
| Dr. Ben Bikman | Why We Get Sick (2020): the case that insulin resistance is the single upstream cause behind cardiovascular disease, type 2 diabetes, Alzheimer’s, PCOS, fatty liver, and most other major chronic conditions. Research-grade, readable. |
| Dr. Dale Bredesen | The End of Alzheimer’s (2017) and The First Survivors of Alzheimer’s (2021): the ReCODE protocol, reversing cognitive decline through a functional medicine approach targeting 36 metabolic factors. The most striking proof-of-concept for the model. |
| Dr. David Perlmutter | Grain Brain (2013), Brain Wash (2020): neurologist applying functional medicine to cognitive and mental health. The gut-brain axis as a central clinical target. |
The central insight of metabolic medicine: insulin resistance and chronic low-grade inflammation are the engine behind most modern chronic disease. Tools for assessment that go beyond BMI: fasting insulin, HOMA-IR, HbA1c, hsCRP, triglyceride-to-HDL ratio, uric acid.
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| Dr. Jason Fung | The standard reference on therapeutic fasting: The Obesity Code (2016) and The Complete Guide to Fasting (2016, with Jimmy Moore). Counter-intuitive, evidence-based, and the clearest explanation of why caloric restriction alone fails. |
| Dr. Sten Ekberg | Exceptionally clear YouTube explanations of insulin resistance, fasting physiology, and metabolic function. Best entry point for people new to the framework. |
| KenDBerryMD | Evidence-based and direct. Strong on dispelling clinical myths that persist in standard practice despite the evidence against them. |
| Dr. Carlos Jaramillo | El milagro metabólico — the most accessible Spanish-language resource on metabolic health. Required reading for Spanish-speaking patients who can’t find this conversation with their physicians. |
Cholesterol and Lipids — Correcting the Standard Story#
The conventional model of cholesterol — LDL as universal villain, statins as universal solution — does not survive contact with the full evidence base. Particle size, metabolic context, and the distinction between LDL-C and LDL-P matter significantly. For people eating low-carbohydrate or ketogenic diets, the standard markers are particularly poor guides.
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| Dave Feldman | Engineer turned citizen scientist. His Lipid Energy Model explains why LDL rises on low-carb diets and why this does not straightforwardly map to increased cardiovascular risk in metabolically healthy individuals. The most important heterodox voice in this space. |
| Dr. Cywes (Carb Addiction Doc) | Addiction framing applied to carbohydrate overconsumption. Clinically useful for understanding why willpower-based interventions reliably fail. |
| Dr. William Davis | Wheat Belly (2011), Undoctored (2017): the case against modern wheat and for self-directed metabolic health management. |
| Ivor Cummins (Fat Emperor) | Irish engineer turned metabolic health researcher. Strong on the epidemiology of cardiovascular disease and the structural weaknesses of the lipid hypothesis. |
Nutrition#
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| Dr. Paul Saladino (CarnivoreMD) | The most rigorous version of the animal-based argument. More useful as a corrective to plant-centric dietary dogma than as a universal prescription — but the data on anti-nutrients and plant defense chemicals is worth engaging with seriously. |
| Dr. Eric Berg | High-volume, practical content on low-carb eating, intermittent fasting, and nutrient deficiencies. Accessible. |
| Dr. Rhonda Patrick (FoundMyFitness) | Micronutrients, sauna therapy, cold exposure, vitamin D, omega-3s. Research-focused; excellent coverage of the longevity and performance literature. |
| Dr. Robert Lustig | Metabolical (2021): the food system as the root of the chronic disease epidemic. The most comprehensive critique of ultra-processed food from a biochemical standpoint. |
Longevity and Healthspan#
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| Peter Attia MD | Outlive: The Science and Art of Longevity (2023) is the most comprehensive current book on healthspan — the distinction between living longer and living well longer. Covers metabolic health, cancer screening, cardiovascular risk, cognitive decline, and exercise physiology in rigorous detail. His podcast The Drive goes deeper on each. |
YouTube Channels#
Key Videos#
Books#
| Title | Author(s) | Note |
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| Good Energy | Casey Means MD & Calley Means | Metabolism as the master variable; the metabolic health crisis explained. Amazon |
| Outlive | Peter Attia MD | The definitive healthspan book: exercise, metabolic health, cancer, cognitive decline, emotional health. |
| Why We Get Sick | Ben Bikman PhD | Insulin resistance as the upstream cause of most chronic disease. |
| The End of Alzheimer’s | Dale Bredesen MD | Functional medicine applied to cognitive decline reversal. |
| The Disease Delusion | Jeffrey Bland PhD | The founding document of functional medicine as a clinical discipline. |
| Metabolical | Robert Lustig MD | The biochemical case against ultra-processed food and the medical system that enables it. |
| Unlocking the Keto Code | Steven Gundry MD | https://smile.amazon.com/dp/B092DKKXS3/ |
| The Great Cholesterol Myth | Jonny Bowden & Stephen Sinatra MD | https://smile.amazon.com/dp/1592339336/ |
| El milagro metabólico | Carlos Jaramillo MD | https://smile.amazon.com/dp/6070761650/ |
| Complete Guide To Fasting | Jason Fung MD & Jimmy Moore | https://smile.amazon.com/dp/B09PLL6VGN/ |
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