the practice of not eating or using any animal products, such as meat, fish, eggs, cheese, or leather

Strict veganism prohibits the use of all animal products, not just food, and is a lifestyle choice rather than a diet. 严格的纯素主义禁止使用所有动物产品，不仅仅是在食物方面，而是一种生活方式的选择，不局限于饮食。