Vegetarianism or vegan diet comes in varied forms, which differ in component and restrictions. Some include:

• Lacto-vegetarian diet – restricts from eating fish, meat, eggs, and poultry except dairy products.
• Lacto-ovo-vegetarian diet – restricts from eating fish, meat and poultry except dairy products and eggs.
• Ovo-vegetarian diet – restricts from eating fish, meat, dairy products, and poultry except eggs.
• Vegan diet – restricts from eating fish, meat, eggs, poultry and dairy products, including products derived from animals such as honey.
• Pescetarian diet – restricts from eating poultry and meat except fish and occasionally, dairy products and eggs.
• Flexitarian diet – mostly vegan, but the diet occasionally includes fish, meat or poultry.

Most vegans restrain from eating fish, meat or poultry. However, some also exclude dairy, eggs and other animal-derived products from their diet.