What is the host kept in the tabernacle after mass?

The host kept in the tabernacle after Mass is the consecrated Eucharist, which Catholics believe is the body of Christ. This practice emphasizes the reverence for the sacrament and allows for the Eucharist to be available for adoration and for distribution to the sick or those unable to attend Mass. The tabernacle itself is typically a highly ornate and secure container, symbolizing the sacredness of the presence of Christ.