A method for producing lean beef, tallow, and lean finely textured beef (LFTB). The method includes combining a mixture of fat particles that are a majority of fat and lean particles that are a majority of lean beef with a fluid, wherein a density of the fluid is greater than a density of the fat particles collecting the fat particles separate from the lean particles by causing the fat particles to rise in the fluid emulsifying the fat particles into an emulsification containing solids heating the emulsification to destroy microorganisms and render the fat into tallow separating the solids from the tallow, wherein the solids produced are lean finely textured beef (LFTB) and treating the separated lean particles with supercritical carbon dioxide, and producing lean beef of about or greater than 90% fat content, wherein the fat particles and the lean particles are separately treated to reduce microorganisms.
