Many people think that diet a medicine is . Many nutrients in food promote health and protect your body from disease. Your body only needs small amounts of vitamins and minerals, they’re vital for your health. The protein and fat in whole, nutritious foods play various critical roles in your body. Following a healthy diet can increase longevity, protect against disease, and improve your overall quality of life. Although many foods have strong disease-fighting benefits, diet should not be considered a replacement for conventional medicine.