B12 only comes from animal products, i.e. meat, poultry, fish, dairy, and eggs, so if you're lacto-ovo, you can get B12 from eggs, milk, yogurt, cheese, ect.
However, if you are vegan, you'll need to eat fortified foods, such as soy/rice milks, cereals, and nutritional yeast.
However, if you are vegan, you'll need to eat fortified foods, such as soy/rice milks, cereals, and nutritional yeast.