This vegan diet promotes the consumption of organic and natural foods such as fresh fruits, coconut milk, natural foods, seaweed, dried fruits, grains, beans, nuts and vegetables [source: WebMD]. There are definitely people who can consume raw food for extended periods of time and be fine and healthy. But most people find it extremely restrictive and have a hard time getting enough vitamin B12 and vitamin A. The reason for this is that some nutrients, such as lycopene (an important antioxidant for prostate and blood health that's found in tomatoes), aren't available until the food is cooked. The same goes for the iron found in leafy greens. "I would never, as a dietician, recommend that someone follow a raw foods diet," says Hardy. "But, if you still decide to, you have to be very committed to food preparation."