Real Presence is a teaching held by many Protestant groups, and has been considered an orthodox position. Lutherans are considered orthodox (within the Protestant movement) and teach this, for one. Luther having written about it and this can be easily found on the Internet. It is not the same as the teaching of Transubstantiation, which Rachel claimed she may believe in the OP. The main difference is that the RCC's doctrine considers the Eucharist an, sort of, extension of Christs body, soul, blood and divinity. It is a divine substance that literally turns into the divine Son. Even going so far as to say that Christ's soul is present in the transformed bread and wine, which is the actual body and blood of Christ to them. To this teaching, I believe all of the early Protestant Reformers objected and posited either the idea of a Sacrament in which there was a presence of Christ or an Ordinance of obedience. To this day, the Protestant church rejects the idea of Transubstantiation. This is perhaps one of the most distinguishing doctrines of the whole of the Protestant movement.