This thesis aims to conduct an interdenominational examination of the sacrament of the Lord’s Supper, using the Reformed doctrine as the primary point of reference. The study analyzes the teachings and practices of seven Christian denominations – Roman Catholic, Eastern Orthodox, Lutheran, Pentecostal, Baptist, and Seventh-day Adventist – seeking to identify similarities and differences in comparison with the Reformed tradition. After presenting each denomination, a separate section addresses the theological contrasts and parallels with Reformed theology. The analysis focuses on theological and liturgical aspects of the Lord’s Supper, with particular attention to views on the presence of Christ, the efficacy of the sacrament, its role within the church community, and its relation to personal faith. The aim of the study is not to promote ecumenical dialogue, but rather to offer an objective and systematic overview of denominational distinctives in the light of Reformed teaching