Chicken Supplies Fish And Chicken Are Needed To Supply Necessary Vitamins, A Vegan Diet Sounds Really Restrictive...?

Fish and chicken are needed to supply necessary vitamins, a Vegan diet sounds really restrictive...? - chicken supplies

Not trying to be offensive:) If I'm wrong, please be stressed, but I always thought, milk, poultry, meat, eggs supply the necessary vitamins .. vegan diet does not cut the necessary nutrients from animal sources? Is not that a vegan diet is limited?