The Sacrament of the Holy Eucharist is central to our Catholic faith. The Holy Eucharist refers to Christ's Body and Blood present in the consecrated host on the altar. What we receive in its external appearance looks like bread and tastes like bread is actually Jesus. Transubstantiation is the theological term to describe the complete change of the substance of Jesus Christ into the external appearance of bread.
By receiving the Holy Eucharist, we increase and deepen our relationship with Jesus, reinforce our relationship with other faithful and the Church, and prepare us for ultimate salvation. As Catholics, we receive the Holy Eucharist every time we attend Mass.