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

KEYPOINTS

• 01

  Functional medicine treats the body as one network

  Hyman describes functional medicine as a systems "operating system" for biology, not just lab tests or supplements. Rather than seeking one diagnosis and dismissing symptoms that don't fit (migraines to neurology, irritable bowel to the GI doctor, a rash to dermatology), it looks at how gut, hormones, mitochondria, inflammation, insulin resistance and toxins interact. His summary: remove the impediments to health, add the ingredients, and let the body's innate healing system work.

• 02

  His own illness shaped the approach

  At 36, after a year working as a doctor in Beijing when homes were heated with raw coal, Hyman developed severe mercury toxicity. He went from cycling 100 miles a day to brain fog, chronic diarrhea, rashes, autoimmune problems, and adrenal, thyroid and mitochondrial dysfunction. Doctors offered antidepressants. Guided by Jeff Bland's systems view, he says he reverse-engineered his recovery system by system, then saw patients improve within weeks on simple diet changes while medical director at Canyon Ranch.

• 03

  Core supplements for most people

  Citing national NHANES survey data, Hyman says over 90% of Americans are low in omega-3s, about 80% are insufficient in vitamin D and over 50% lack enough magnesium. He blames depleted soils and a diet narrowed from hundreds of plant species to a few. His basics: at least 1 to 2 grams of EPA/DHA, 2,000 to 4,000 IU of vitamin D3, and a quality multivitamin with bioavailable forms, third-party tested and free of fillers or dyes such as titanium dioxide. Iodine may help people who've switched from iodized salt to sea or Himalayan salt.

• 04

  Test, don't guess

  Needs vary. Some people need 10,000 IU of vitamin D to reach the blood level others get from 1,000, because of genetic differences in vitamin D receptors. Older men shouldn't take much iron, while menstruating women may need more. Hyman argues "normal" cutoffs are too low: ferritin of 16 can still bring fatigue, brain fog, hair loss and insomnia, and he prefers vitamin D and ferritin above about 45. Lipids can shift within a month of a change. Vitamin D and iron can take about three months to rebuild.

• 05

  ApoB beats a standard cholesterol panel

  Hyman calls the total/LDL/HDL/triglyceride panel outdated and says the American Heart Association recognizes ApoB as a better predictor of heart attack risk than LDL. Insulin resistance raises triglycerides, ApoB and small LDL particle number while lowering HDL. He's not a big statin fan but calls them a tool, like a hammer when you need one.

• 06

  The same diet can move lipids in opposite directions

  One overweight, prediabetic patient on a ketogenic diet saw total cholesterol drop 100 points, triglycerides drop 200, HDL rise 30, and lost 20 pounds. A lean mid-50s athlete on the same diet saw cholesterol, LDL and particle number soar, an example of the "lean mass hyper-responder" pattern. Hyman cites Ron Krauss's particle-size work and argues for comparing yourself against your own baseline.

• 07

  GLP-1 drugs need guardrails

  Hyman says these peptides are given at doses far above what the body makes. Much of the weight lost can be muscle, and over 65% of people who stop regain weight with less muscle. He'd require nutrition (protein) counseling and strength training alongside any prescription. He also urges DEXA scans before, during and after treatment, plus kidney, liver, amylase and lipase monitoring. He cites risks that rise with time on the drug, including roughly 4.5-fold higher bowel obstruction risk at four years, plus pancreatitis, which is rare. He says many of his patients have lost 100-plus pounds without them.

• 08

  Support your own detox pathways

  For heavy metals, Hyman's sequence is to cut exposure, then boost the liver's pathways with cruciferous vegetables, garlic, cilantro juice and fiber, then add nutrients: glutathione boosters like N-acetylcysteine (he takes 600 mg daily), lipoic acid, methylating B vitamins and adequate protein. He uses silica and seaweed alginates as binders, not charcoal, and sometimes the prescription chelator DMSA under a doctor's care. Huberman takes sulforaphane.

• 09

  Hormones are falling earlier

  Hyman says sugar- and starch-heavy diets push women toward PCOS and lower men's testosterone (bigger belly, lower testosterone), and endocrine disruptors add to it. He wants young men to exhaust lifestyle fixes before testosterone replacement, given its effects on sperm count unless offset with hCG. Huberman notes he started TRT at 45 and freezes sperm yearly. Hyman recommends regular sex hormone panels for both sexes, including DHEA sulfate in women as a possible PCOS marker.