From 'Healthy' to Healthy

I am not a physician, nutritionist, or licensed healthcare practitioner, and I am not selling a medication, a supplement, or a diet. Nothing here is medical advice, diagnosis, or treatment — it is part anecdote, part working hypothesis, part established science, and a personal map of authors I find worth taking seriously. For anything concerning your own health, consult a qualified professional who knows your case.

Updated 2026-08-13 — rewrote the page as an essay tying insulin resistance, food, sleep, movement, stress, isolation, and status together as one argument; added a section on legal drugs, social connection, and status/health; the presentation built from this essay is coming soon; the working reading list below now sits under Further reading, extended with the new sources the essay cites.

Updated 2026-07-21 — added a Gallbladder and Gallstones section (Dr. Eric Berg, Chris Kresser, Nesse & Williams, and the insulin-resistance mechanism papers) and added Dr. David Sinclair to Longevity and Healthspan; refreshed the video and book tables.

Updated 2026-07-08 — added Featured, Sleep, Exercise, and Metabolic Psychiatry sections (incl. Dr. Sean O’Mara on sprinting and visceral fat); folded channel links into each entry; refreshed the video and book tables.

“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.

You can follow the standard advice for a decade — count the calories, join the gym, take the annual physical — and still arrive at fifty insulin resistant, inflamed, and told your labs are “normal.” Normal, in most clinical panels, means not yet at the threshold where a drug gets prescribed. It does not mean the system regulating your blood sugar, your appetite, and your mood is actually working. There is a wide, undiagnosed territory between those two conditions, and almost nothing in the standard advice is built to find you there. What follows is an attempt to walk that territory in one pass — not as a dozen separate self-help topics, but as one mechanism wearing many costumes: insulin resistance as the hub, and food, sleep, movement, stress, isolation, and status as the spokes. The full working list of researchers and books behind it — the one this page has always kept — is assembled underneath, under Further reading.

I. The wrong goal.

Ben Bikman’s Why We Get Sick makes the single most useful reframe in this entire subject: insulin resistance is not one disease among many, it is the upstream condition behind most of them — cardiovascular disease, type 2 diabetes, fatty liver, PCOS, a meaningful share of Alzheimer’s. Losing weight is not the goal. Lowering a number on a scale is not the goal. The goal is a cell that still hears insulin’s signal — and almost every choice that follows is downstream of that one target.

Functional medicine, in the tradition Dr. Casey Means lays out in Good Energy and Dr. Carlos Jaramillo practices daily with Spanish-speaking patients in El milagro metabólico, is less a treatment protocol than a stance: ask why the system went out of balance before asking what pill suppresses the symptom. That stance is also what licenses an essay like this one — part anecdote, part hypothesis, part science — to exist honestly, rather than pretending to a certainty medicine itself doesn’t have on most of these questions.

II. Food as it was, food as it became.

Richard Wrangham’s Catching Fire makes the case that cooking, not agriculture, is what built the human brain — fire pre-digesting food outside the body freed calories that raw digestion couldn’t extract. That’s the old, load-bearing technology. What changed is everything downstream of it: Gary Taubes, in Good Calories, Bad Calories, traces how refined carbohydrate and industrial seed oil replaced the food that built us, not gradually, but within a century — an evolutionary eyeblink. Chris van Tulleken’s Ultra-Processed People names the newer layer precisely: food engineered not to nourish but to be eaten past the point of satiety, formulated by chemists rather than grown by farmers.

Daniel Lieberman’s The Story of the Human Body supplies the frame for why this matters more than any single nutrient debate: we are running Paleolithic hardware on an industrial food supply, and most of what gets called a “disease of aging” is actually a mismatch disease — a body doing exactly what it evolved to do, in an environment it never evolved for.

III. The calorie is a lie, the snack is a symptom.

Jason Fung’s The Obesity Code makes the hormonal case directly: what you eat changes insulin, and insulin — not willpower, not a spreadsheet of calories in versus calories out — decides whether your body stores fat or releases it. Herman Pontzer’s Burn adds the physiological twist that should have ended the “just move more” era of advice: hunter-gatherer populations, dramatically more active than the average office worker, burn roughly the same total daily calories, because the body compensates for exercise by throttling energy spent elsewhere. Movement matters for a hundred reasons. It is a weak lever for the number on the scale.

Snacking is the cultural artifact of the calorie framework taken literally — eat less at each sitting, eat more often, keep insulin perpetually elevated, never let the fasted state that triggers fat mobilization actually arrive. Robert Lustig’s Metabolical names the industry that profits from exactly this pattern: constant small hits of engineered palatability, sold as a solution to the hunger that same industry helped create.

IV. Sleep, light, and the clock we ignore.

Matthew Walker’s Why We Sleep remains the widest-reaching case that sleep is not downtime but active metabolic maintenance — one bad night measurably worsens insulin sensitivity the next day. Satchin Panda’s The Circadian Code extends the argument to the variable modern life treats as trivial: light. Every cell runs its own clock, synchronized by the timing of light and food, and a species that evolved under a sun with no dimmer switch now spends its evenings under screens and its days under office fluorescents, telling every organ a different, contradictory time. Circadian misalignment is not an aesthetic complaint about jet lag. It’s a direct input into the same insulin-resistance pathway as diet.

V. Move like the body expects to move.

Dr. Sean O’Mara’s clinical argument, built on his own before-and-after MRI imaging, is that the specific exercise most absent from modern life is the sprint — not the marathon, not the daily gym routine, but short, maximal, infrequent effort. His case is that sprinting uniquely mobilizes visceral fat, the metabolically dangerous fat wrapped around the organs that BMI cannot see and steady-state cardio barely touches. The broader point generalizes past sprinting specifically: the body was built for irregular bursts of high intensity punctuating long stretches of low-intensity movement, not for either total stillness or a scheduled hour of “exercise” bracketing twenty-three sedentary ones.

VI. The stress machine.

Robert Sapolsky’s Behave and his earlier Why Zebras Don’t Get Ulcers diagnose the actual malfunction: the cortisol response evolved to end a lion chase in ninety seconds, not to run continuously against a mortgage, a news cycle, and an inbox for forty years. Chronically elevated cortisol drives the same insulin resistance the earlier sections describe from a different direction — stress and sugar are not separate chapters, they’re two inputs into one hormonal system.

Legal drugs enter here because most of what people use to manage that chronic stress — caffeine, alcohol, nicotine, benzodiazepines, stimulants prescribed for attention rather than genuinely optimized for it — get used without the rational framework applied to almost anything else consumed daily. Carl Hart’s Drug Use for Grown-Ups, written by a Columbia neuroscientist rather than a moralist, makes the case that treating drug use as a binary of abstinence versus catastrophe produces worse outcomes than treating it as what it actually is: a risk to be managed with information, dosage, and honesty, the same way we manage everything else in this essay.

VII. The body needs a village.

Vivek Murthy’s Together, written from his tenure as US Surgeon General, makes the case that loneliness is not a mood problem — it’s a measurable, independent risk factor for early death, on par with smoking. Social isolation raises cortisol and inflammatory markers through the same stress pathway Section VI describes; the body reads disconnection as a threat because for most of human history, exile from the group was a threat, often a fatal one. Modern life has quietly re-created that exile at scale — smaller households, remote work, screens standing in for the third places where people used to simply be around each other — without the predator that used to make isolation a solvable, visible problem.

VIII. Status, merit, and the pressure that makes you sick.

Sir Michael Marmot’s The Status Syndrome supplies the direct biological link this essay has been building toward: your position in a status hierarchy predicts your health independent of income, independent of access to care — because rank itself, not just resources, regulates the stress-hormone system covered in Section VI. This is the same territory The New Job Market covers from the labor-market side — Michael Sandel’s The Tyranny of Merit on what the meritocratic story does to the people it tells they lost fairly, Richard Wolff on wages as a power negotiation, Scott Galloway on what actually gets rewarded — argued there as a structural critique of opportunity, argued here as a direct physiological cost. The pressure to out-earn, out-credential, and out-produce your neighbor is not just an economic condition. It’s a hormonal one, and it compounds with everything in Sections I through VII rather than sitting apart from them.

Presentation

[ Coming soon… ]

Further reading

The people and books below are the raw material this essay draws from — the working list this page has always kept, extended with the sources behind the newer sections above (nutrition and the food supply, calories, sleep and light, stress and legal drugs, isolation, and status).

Featured

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:

Metabolic Health

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.

Gallbladder and Gallstones

The gallbladder is a small, concentrated case of the whole functional-medicine argument: cholecystectomy is one of the most common abdominal surgeries performed, and “you don’t need that organ” gets treated as a self-contained fact rather than as the endpoint of a metabolic process that started elsewhere. Dietary fat was never the strongest predictor of gallstone formation — hepatic insulin resistance is. Insulin-resistant liver tissue increases biliary cholesterol secretion and produces lithogenic bile directly, which is the mechanistic finding behind the clinical correlation between HOMA-IR, waist circumference, and gallstone risk. I made this exact case the opening argument of When Illness Becomes Normal, on cholecystectomy as the concentrated case for reading chronic metabolic illness as one ecological shift rather than six unrelated diagnoses.

Mechanism and epidemiology, for the primary-source-inclined: Biddinger et al., “Hepatic insulin resistance directly promotes formation of cholesterol gallstones” (Journal of Clinical Investigation, 2008) is the mouse study establishing the causal pathway; Gallstones in the Era of Metabolic Syndrome: Pathophysiology, Risk Prediction, and Management is a recent clinical review of the human epidemiology.

Metabolic Psychiatry

The newest and one of the most consequential extensions of the metabolic thesis: that many psychiatric conditions are, mechanistically, metabolic disorders of the brain. If insulin resistance and mitochondrial dysfunction drive chronic physical disease, the same machinery may underlie depression, anxiety, bipolar disorder, and more — which reframes diet, sleep, and metabolic health as first-line mental-health interventions rather than adjuncts.

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.

Nutrition

Sleep and Light

Sleep is the pillar the other three (nutrition, exercise, metabolic health) all depend on — and the one most easily sacrificed. Poor sleep drives insulin resistance, appetite dysregulation, and impaired glucose tolerance directly, which folds it back into the metabolic story rather than sitting beside it. Circadian light exposure is the less obvious variable behind it: every cell keeps its own clock, synchronized by light and food timing.

Exercise

Muscle is metabolic real estate: it is the largest site of glucose disposal in the body, which makes strength and cardiovascular fitness metabolic interventions, not just aesthetic ones. Attia’s Outlive (below) treats VO₂max and strength as among the strongest predictors of healthspan.

Stress, Cortisol, and Legal Drugs

Social Connection

Status, Merit, and Health

Longevity and Healthspan

Key Videos

Books