Plant-based diets have existed since ancient times, but the term "plant-based" is just around 20 years old, according to a 2022 review that defines plant-based foods as fruits, vegetables, nuts, seeds, legumes, herbs, spices, and whole grains. Unlike vegan eating, a plant-based or, alternatively, plant-focused, diet does not have to exclude animal foods like red meat, fish, chicken, eggs, and dairy. Rather, a plant-based eater may still enjoy animal foods while deliberately building an overall eating pattern that is rich in or primarily made of plants, but not consisting only of plants.