Food must be healthy and nutritious. All the health organizations including: the cancer society, heart association, diabetes association, world health organization, and even nutritionists from John Hopkins University say the best diet is a plant-based diet. So, the best diet is a diet of at least 60-70 % fresh fruits and vegetables. Vegetables should be rich in their color. They should not be over ripe or under ripe but just right. No spoilage, damage, or bruised food, if so, cut it off.