The idea that plant-based nutrition is healthy is old, very, very old. But the bedrock of serious nutritional science to back it up is T. Colin Campbell's book "The China Study." That book, and his course, which is available at the T. Colin Cambpell Center for Nutritionstudies are the foundation. Aside from that there are many other good sources, but Campbell's idea of Whole Foods, Plant-based nutrition is the solid bedrock on which this whole new understanding of nutrition and health is based. The Easy Way: The paradigm is defined in two ways: limit your food to only whole foods, all of a plant origin, with minimal processing. Whole Foods, Plant-Based, or #WFPB for short. SOS means: moderatate salt intake, no oil, moderate or eliminate refined sugar. Instead of surag, use fruits or fruit sugar like date sugar, which is really just ground up dates. The point is the sugar is not separated from the fiber. Another good guideline is the 80/10/10 rule: We get: 80% of our calories from unprocessed carbs, e.g. brown rice, Whole Wheat, and so on 10% of calories from naturally occurring oils and fats (beans, avocado). 10% of calories from proteins, and remember even spinach gives you 50% of calories from protein, or rice or potatoes, about 11%. The obsession over protein is entirely misplaced, unless you eat cardboard all day long. #WFPB is purely about good nutrition. By contrast: Veganism is secular ethics: concern for the planet, concern for animal welfare. Vegetarianism is religious ethics: ahimsa, thou shalt not kill, etc. The upshot is you can be vegan and eat unhealthy: Potatochips (cooked in vegetable oil, not beef tallow!) and beer (as long as it does not have isinglass), are vegan, but not recommended for a staple diet. Vegetarianism still allows for dairy and (unfertilized) eggs, which can be very unhealthy. Removing dairy often leads to massive health improvements. I have my father to remind me, for he was vegetarian, but he ate cheese by the ton, and predictably died of a stroke at age 63.