A plant-based diet is a type of diet that consists entirely or mostly of plant-based foods. A wide range of dietary patterns fall in this category, all unified by a focus on high amounts of fiber-rich plants. They are thus defined in terms of high frequency of plants and low frequency or absence of animal food consumption. Examples include vegetarian diets, vegan diets, whole-food, plant-based diets, or "plant-forward" diets akin to the Mediterranean diet.