The Church requires all Catholics from ages 14-59 to fast on Ash Wednesday and Good Friday. As long as you are in good health, this means that you should only eat one full meal, plus two smaller meals that do not equal a full meal.
Another powerful invitation to grow in your spiritual life is abstaining from meat. Catholics age 14 and older do not eat meat on Ash Wednesday and all Fridays during Lent, including Good Friday.