Just what is the fruitarian diet and why is it getting so popular? One editor finds out about this cult diet. We've all heard the cliche that an apple a day can keep the doctor away, but is the same true for a virtual cornucopia of red foods, including strawberries. Fruits, vegetables and fish should be the basis of any healthy diet. or TLC, not only include these foods groups as a base, but also include healthy whole colors, with a focus on dark green, red and orange vegetables, and beans and peas.