Key Takeaways:

• Argues that everyday diet is the most underappreciated determinant of health, more powerful than many people realize.
• Uses historical case studies and modern examples to show how food has repeatedly turned the tide in epidemics, individual illnesses, and national health profiles.
• Urges readers to treat “small” dietary shifts—like cutting refined products and emphasizing whole foods—as major interventions rather than trivial tweaks.