This guide on healthy vegetarianism covers multiple aspects. It introduces the definition, classification, and benefits of vegetarians, including disease prevention and cost savings. It also elaborates on how to become a vegetarian, such as gradually reducing meat intake and paying attention to nutritional balance. It discusses the relationship between vegetarianism and weight loss and gives food selection and combination suggestions. It tells about vegetarian sports nutrition, including dietary key points before and after exercise. It introduces vegetarian cooking, emphasizing its ease of learning, high nutrition, and suitability for people of different cooking levels, and gives ingredient selection and cooking method suggestions. Finally, it mentions low-carb vegetarianism, explains the role and impact of carbohydrates, and gives corresponding dietary suggestions.