writes ""a beefburger rarely contains 100% beef .. An economy beefburger must contain 47% meat .. Under European law, the term "meat" is defined as "skeletal muscle with naturally included or adherent fat and connective tissue" which has not been mechanically stripped from the carcass.
Any meat that has been pressure-blasted from the carcass must be listed separately as MRM (mechanically removed) or MSM (mechanically stripped) meat. MRM meat or paste can in theory be used in economy burgers but has to be listed as a separate ingredient."Link to Original Source