In Norse mythology, the goddess Idunn had an apple tree whose fruit bestowed eternal youth.
In Chinese mythology, there was a goddess who grew peaches that bestowed immortality.
Dracula was quite fond of the blood of the living.
In Fairy lore, you must never eat or drink anything in Fairyland, or you will become the Fairies’ slave, & be forced to stay there forever.
According to www.m-w.com, ambrosia was
Nectar was their drink.