There is a difference between a validly concecrated host which becomes the Body, Blood, Soul and Divinity of Jesus Christ and a piece of bread that others use for communion. They think of the sacrament as a social event, not receiving the actual Body of Christ. That is why non-Catholics may not partake of the Eucharist in a Catholic Church and why Catholics may not receive in a protestant church.
Most Holy Trinity, Father, Son and Holy Ghost, I adore Thee profoundly, and I offer Thee the most precious Body, Blood, Soul and Divinity of Jesus Christ, present in all the tabernacles of the world, in reparation for the insults, sacrileges and indifference by which He Himself is offended.
Through the infinite merits of His Most Sacred Heart and of the Immaculate Heart of Mary, I ask of Thee the conversion of poor sinners.