Final answer:
A vegan is a total vegetarian who eats only plant foods and does not use animal products for any other purposes. They obtain protein from a variety of plant sources, such as legumes, tofu, tempeh, seitan, quinoa, and nuts.
Step-by-step explanation:
A vegan is a total vegetarian who eats only plant foods and does not use animal products for any other purposes. Vegans do not consume any animal products, including meats, eggs, or dairy products. They obtain protein from a variety of plant sources, such as legumes, tofu, tempeh, seitan, quinoa, and nuts. While individual plant foods may not contain all the essential amino acids, by combining different plant-based protein sources throughout the day, vegans can ensure they are getting all the necessary amino acids for protein synthesis.