 Denominations of Christianity that hold to a doctrine of Communion under both kinds may believe that a Eucharist which does not include both bread and wine as elements of the religious ceremony is not valid, while others may consider the presence of both bread and wine as preferable, but not necessary, for the ceremony.In some traditions, grape juice may take the place of wine with alcohol content as the second element.In reference to the Eucharist as a sacrifice, Communion under both kinds belongs at least to the integrity and essence, of the rite, and may not be omitted without violating the precept of Christ