The major thing to keep in mind when considering the subject of vegetarianism is its relevancy in relation to our explorations of consciousness. We need only ask: Does it facilitate my spiritual growth–the development and expansion of my consciousness? The answer is Yes.
“One acts according to one’s prakriti. Even the jnani does so. Beings follow their own prakriti; what will restraint accomplish?” (Bhagavad Gita 3:33). Many supposedly moral or spiritual problems are only matters of energy behavior. If the energies are purified and re-centered where they belong, instantly the problem vanishes. But such a purification and repositioning is not possible with energies other than those absorbed from sunlight, air, and plant life.
The best part about all this is that you can discover the truth for yourself by simply trying a vegetarian diet. Of course it must be a sensible one with those things that will nourish the body correctly. But you need only go on a vegetarian diet, eat correctly, and watch for the benefit. It will come.