Besides vegetarianism, there is also a kind of veganism, those vegans not only do not eat the meat of any sentient being, but also exclude eggs, dairy products and even honey, that is to say, they only rely on plant foods to sustain their lives, and do not touch any food that comes from animals. In addition to food, vegans do not use goods made from animals, such as leather clothing, shoes, belts, purses, and other leather products, and cosmetics containing animal ingredients.

Ovo-lacto vegetarians, in general, consume foods that are partly of animal origin, such as eggs and dairy. Some vegans refuse to eat cheese and cakes, which are factory-produced foods with animal ingredients, because of ethical considerations.

Lacto vegetarians are those who do not eat meat, but do consume milk and its related products, like cheese, cream or yogurt.

Egg-vegetarians (oovo-), similar to lacto-vegetarians, consume eggs and their related products.

The foods of the Longevity Healthy Diet are primarily grains and legumes, including Fructarianism (Fructariansim) .

Raw foodism, a method of eating that keeps all food in its natural state, even when heated to no more than 47 degrees Celsius. Raw foodists believe that cooking destroys enzymes or nutrients in food. Some raw foodists, called activated raw foodists, soak foods in water to activate their enzymes before consuming seed-based foods. Some raw foodists consume only organic foods.

Fruitarianism consumes only fruits and juices or other plant fruits.

Some vegans may not consume certain meats based on health, morality, or beliefs, such as red meat from mammals such as cows, goats, and pigs is the most common type, and these people will consume some poultry and seafood. This is not traditional vegetarianism, but semi-vegetarianism.

Liberal vegetarianism, these types of people are primarily vegetarian and will occasionally consume meat.

Ascetic vegetarianism, this type of person in order to firmly believe in the heart, in an ascetic way to vegetarianism, not only abstain from eggs, milk, and even abstain from soy, salt. Representative figure: Gandhi.