Let me preface my answer by stating I have a master's degree in medicinal chemistry, a Ph.D. in physical organic chemistry, and have devoted my life to understanding how the molecules in plants can be used to help humankind. The answer to your question is, "Yes...mostly." The health benefits of the herbs, fruits, veggies, mushrooms, etc used in Ayurvedic diet have undergone rigorous scientific testing and found to truly have all sorts of benefits for use. The "mostly" part of my answer comes from the issue of a purely plant-based diet. If one is extremely careful, dedicated, and willing to spend the money you can get all the nutrients needed this way. Alas, many people don't give such a diet the amount of effort necessary and end up malnourished. Not everybody, but many. If you're the type that can't/won't give it your all then I strongly recommend you keep meat products, in moderation, in your diet. Fish, lean wild game, and assort organs (available in capsule forms if you don't like liver, kidneys, etc) would help your body by giving it what we evolved giving it.