Modern Disease
TheChronicDiseasesofOurTimeShareOneThing
Heart disease, type 2 diabetes, several cancers, hypertension, dementia, obesity — the conditions that account for over 70% of global deaths share a surprising amount of root cause. And a surprising amount of solution.
The Common Thread
A Shared Soil — and a Shared Lever
For most of human history, the diseases that killed people were infectious — plague, tuberculosis, cholera, pneumonia. Today, in every industrialised country and increasingly in middle-income ones too, the leading causes of death are chronic: heart disease, cancer, diabetes, dementia, stroke. What's striking, when you look at the underlying biology, is how much they have in common.
All of these diseases are driven, to a significant extent, by chronic low-grade inflammation, insulin resistance, oxidative damage and endothelial dysfunction. All of them respond — in randomised trials, in cohort studies, in clinical practice — to changes in what we put on our plate. And all of them respond in roughly the same direction: more plants, fewer animal products, less processed food.
This page introduces the conditions most clearly tied to diet. Click through to read the deep dives on the ones most relevant to you or your family.
The biggest pharmaceutical breakthrough of the next decade may turn out to be a vegetable.
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How Lifestyle Medicine Is Quietly Transforming Care
The Conditions
Where Diet Has the Most Leverage
Heart disease
The world's leading cause of death. Plant-based diets are the only dietary pattern shown in randomised trials to reverse coronary atherosclerosis (Ornish 1990, Esselstyn 2014).
Read moreType 2 diabetes
Affects 537 million people globally. Often fully reversible with whole-food plant-based diet — vegans show ~50% lower incidence than omnivores in matched cohorts.
Read moreCancer
WHO classifies processed meat as Group 1 carcinogen. Plant-rich diets are associated with substantial reductions in colorectal, breast, prostate, and several other cancers.
Read moreAlzheimer's & dementia
MIND-diet adherence (largely plant-based) is associated with up to 53% reduction in Alzheimer's risk. Vascular dementia shares the same risk factors as heart disease.
Read moreHigh blood pressure
Plant-based diets reduce systolic blood pressure by an average of 6–9 mmHg — comparable to a single antihypertensive medication, without the side effects.
Read moreHigh cholesterol
Whole-food plant-based diets lower LDL cholesterol by 25–35% — a magnitude comparable to a moderate-dose statin — without side effects.
Read moreObesity
Vegans average a BMI ~5 points lower than omnivores. Whole-food plant diets reliably produce sustained weight loss without calorie counting.
Read moreFatty liver (NAFLD/MASLD)
Now affects 1 in 3 adults globally. Plant-based diets reduce hepatic fat by 30–50% within weeks and are the most consistently effective dietary intervention.
Read moreThe Risk Reductions
What Switching to a Whole-Food Plant Diet Actually Buys You
Risk reductions in major plant-eating cohorts (vs. omnivore controls)
These are not marginal effects. A 32% reduction in heart disease — the world's leading killer — is a larger effect than statin therapy delivers in primary prevention. A 50% reduction in type 2 diabetes is larger than any pharmaceutical intervention currently available. These are the kinds of outcomes the rest of medicine spends billions of dollars chasing.
In Their Own Words
A Cardiologist on the Lever Most Doctors Underuse
“If we could take the effects of the Mediterranean diet, plus the effects of regular exercise, plus stopping smoking, and put them in a pill — every doctor in the world would prescribe it. The food itself is more powerful than most of what we have in the pharmacy.”
Common Questions
What People Ask Their Doctors
The Most Powerful Pharmacy You'll Ever Use Is Already in Your Kitchen.
Every meal is a quiet conversation with your future body. Make it a kind one.