Catholics believe that the Eucharist is real food and real drink -the Body and Blood of Christ – it is the Real Presence not symbolic. It is the Lord Jesus present in the tabernacles of our churches with His Body, Blood, Soul and Divinity. It is Jesus veiled under the appearance of bread, but really and physically present in the consecrated Host, so that He dwells in our midst, works within us and for us. The Eucharistic Jesus is the true Emmanuel, the “God with us”"(Mt. 1:23).
There is enough documented evidence to show how the consecrated host has actually transformed into the actual flesh and blood (miracles of Naju, Korea – Ms Julia Kim actually received the Holy Eucharist in the presence of the Holy Father, Pope John Paul II, in Rome and the Host actually became flesh and blood).
Eucharistic wonders are recorded in the lives of St. Rose of Lima, Bl. Angela of Foligno, St. Catherine of Siena, St. Philip Neri, St. Francis Borgia, St. Joseph of Cupertino, and many other saints, who sensibly perceived the Real Presence of Jesus in the tabernacle and in the consecrated Hosts, seeing Jesus with their own eyes or enjoying His indescribable fragrance.
Well known is the episode in the life of St. Anthony of Padua when he once proved the Real Presence to an unbeliever by showing him a hungry mule kneeling before a monstrance containing the Blessed Sacrament, in preference to devouring the basket of oats placed beside the monstrance.
The Sanctuary of Lanciano (in Abruzzi, Italy), in particular, is unique of its kind among the world’s Eucharistic sanctuaries and deserves to be better known throughout the entire world. There the marvelous presence of a Host transformed into live Flesh and preserved in this condition for many centuries can be contemplated. It is a visible miracle which amazes and moves hearts to this very day.
The Protestants have no evidence of any such Eucharistic miracle simply because they do not believe in the Real Presence. Since there is no faith, surely no miracle will follow (Mat13:58 - And He did not do many mighty works there, because of their unbelief.)