How to Improve Your Vitality & Heal From Disease | Dr. Mark Hyman

Functional medicine views the body as a connected system where gut, immune, hormonal, mitochondrial, and brain functions interact. Instead of chasing diagnoses and organ‑based specialties, it asks: what inputs (diet, toxins, infections, stress) are disturbing function, and what ingredients (nutrients, sleep, movement, connection) are missing? Addressing multiple imbalances at once—rather than one drug for one symptom—often leads to surprisingly rapid symptom resolution across seemingly unrelated conditions (e.g., migraines, autoimmunity, depression clearing when gut and inflammation are fixed).

While industrial seed oils are not ideal, Hyman is unequivocal that the main metabolic crisis is driven by pharmacologic doses of sugar and refined flour: roughly 150+ pounds of sugar and 130+ pounds of flour per person per year. The harmful combo is fat plus refined starch/sugar (butter on muffins, oil on ultra‑processed carbs), not fat or starch in isolation. Whole‑food fats (olive oil, avocado, nuts, seeds, omega‑3‑rich fish, modest butter) and minimally processed carbs can be part of a healthy diet; ultra‑processed foods and sugary drinks should be the first thing to cut.

NHANES data show widespread deficiencies or insufficiencies in vitamin D, omega‑3s, magnesium, iron, zinc, iodine, and B‑vitamins due to depleted soils, processed diets, indoor living, and genetic variability in nutrient needs. Hyman suggests that for most people, a high‑quality multivitamin (with bioavailable forms), 1–2 g/day EPA+DHA, 2,000–4,000 IU/day vitamin D3 (often more, based on labs), and an appropriate form of magnesium are powerful basics. Iron, zinc, iodine, B12/folate, etc. should be personalized based on testing, age, sex, and diet (e.g., vegans nearly always need targeted supplementation).

Budget‑constrained people can still dramatically improve health by prioritizing simple, cheap basics: mostly single‑ingredient or minimally processed foods (eggs, beans, lentils, frozen vegetables, cheaper cuts of meat, canned fish), consistent sleep, and body‑weight exercise. Industrial food has convinced Americans that health food is elitist and expensive, but much of the cost is externalized into healthcare and environmental damage. Shifting away from ultra‑processed foods and sugary drinks toward home‑cooked, whole‑food meals—even non‑organic—produces rapid measurable changes in lipids, insulin, inflammation, and body weight within weeks.

Hyman argues that relying on the standard 15–20‑marker annual blood panel is obsolete. Markers like ApoB, particle number/size, insulin and C‑peptide, homocysteine, vitamin D, ferritin, omega‑3 index, methylation markers, thyroid panel, and even early cancer and Alzheimer’s markers can radically change risk assessment and treatment. Platforms like Function Health (150+ biomarkers) plus wearables/CGMs allow people to see how dietary and lifestyle changes move their numbers in a month or two, turning each person into an N=1 experiment rather than a statistic.