The present invention is directed to an intermediate composition for producing
a muscle tissue matrix suitable for implantation in humans, comprising shredded,
allogeneic human muscle tissue that has been combined with an aqueous carrier,
preferably a biocompatible acid solution, to form a muscle tissue slurry having
a viscosity within the range of 1 centistoke to 20,000 centistokes measured at
25 C. In another aspect, the present invention is directed to a tissue implant
comprising a human muscle tissue matrix.