As societies advance, they appear to graduate from suffering from the afflictions of poverty (infections, starvation, malnutrition) to suffering the diseases of affluence (diabetes, hypertension, heart disease, Alzheimer’s, etc).
Today diseases of overabundance impact more people than diseases of underdevelopment (obviously true in advanced countries but also true worldwide). In America, 83% of deaths are due to non-communicable diseases.
No. Among migrant populations, there is less chronic disease burden. For example, heart disease in traditional African societies is rare. In contrast rates of heart disease among African Americans is comparable to Caucasians.
Follow a healthy diet and exercise regularly. You might also be told to sleep well and reduce stress.