Metabolic dysfunction as the common root of chronic disease
September 27, 2026 · 23 min read
Attia's Four Horsemen framing, Palmer's work on carb restriction, Epel's research on stress-driven eating and Hyman's functional medicine all point to insulin resistance and poor metabolic health as a shared upstream cause. Fixing metabolism may lower the risk of several diseases at once instead of treating each one separately.
The rules, numbers and steps worth keeping in front of you.
- Attia's four horsemen: atherosclerosis, cancer, neurodegeneration and metabolic dysfunction.
- Attia: more than 50% of Americans are on the metabolic dysfunction spectrum without knowing it.
- Attia's sequence: high insulin, insulin resistance, fatty liver, then type 2 diabetes.
- Attia's four causes: too much carbohydrate, too little muscle, too little sleep, chronic stress.
- Attia: two weeks of poor sleep can cut glucose tolerance by up to 50%.
- Attia: don't eat within three hours of bed.
- Attia: fitness gaps in mortality are far larger than the roughly 25% from type 2 diabetes.
- Palmer: the high-sugar, high-fat processed combination seems worst for metabolic health.
- Palmer: large randomized trials in mental disorders do not yet exist.
- Palmer: serious mental illness or psychiatric medication means working with a medical professional; never stop medication alone.
- Epel: chronic stress drives cravings, insulin resistance and abdominal fat.
- Epel calls sugary drinks the worst thing for the body.
- Hyman's avoid list: high-fructose corn syrup, trans fats and hydrogenated oils, unpronounceable ingredients.
- Work out details with a qualified clinician, especially with diabetes, heart disease or a psychiatric condition.
This is the short form. The full insight has every expert's reasoning, their own words and the sources.