A vegan diet excludes all meat and animal products (meat, poultry, fish, seafood, dairy and eggs), whereas a vegetarian diet excludes meat, poultry, fish and seafood.
However, there are a few variations of a vegetarian diet that depend on whether you eat or exclude eggs, dairy and fish.
A vegetarian eats no meat at all, including poultry or fish.
A lacto-ovo vegetarian eats dairy products and eggs.
A lacto vegetarian eats dairy products but not eggs.
An ovo vegetarian eats eggs but not dairy products.
Lacto-vegetarian diets exclude meat, fish, poultry and eggs, as well as foods that contain them.
Dairy products, such as milk, cheese, yogurt and butter, are included.
Ovo-vegetarian diets exclude meat, poultry, seafood and dairy products, but allow eggs.