This document summarizes and compares vegetarian and non-vegetarian diets. It defines vegetarian diets as including fruits, vegetables and optionally dairy or eggs, while excluding meat. Non-vegetarian diets include meat, eggs, fish and seafood. The document discusses the nutritional content of each diet and their effects on human body systems and disease risk. It provides lists of good sources of nutrients for vegetarian diets and concludes by discussing the spiritual perspectives on diet.