however, nowhere in christianity is the drink consumed at the eucharist actual blood, even among denominations believing in transsubstantiation (the sacramental transformation of the bread and wine into the body and blood). the liquid consumed is typically wine or grape juice. the consumption of actual blood is in fact forbidden according to the book of leviticus, part of both jewish and christian holy scriptures. the "words of institution", which includes the words jesus said to his disciples at the last supper, would have been surprising and even unsettling to those present for this reason, especially as the last supper was a passover seder. the ban on consumption of blood by christians was affirmed after jesus' death by the apostolic decree, chronicled in the acts of the apostles.