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Originally Posted by killer_carlson

western cultures eat cow tongue and heart all the time. It's what is added to lean ground beef to make it "extra lean" at the supermarket. All meat, no fat. To make regular ground beef, they add fat.

as per a relative who worked in the meat department at Superstore.

I made this really easy for you this time.

beef meat only
other ingredients not allowed
maximum fat levels:
extra lean - 10%
lean - 17%
medium - 23%
regular - 30%

Beef tongue, lips, internal organs (e.g., heart meat), and spinal cords are not considered to be "meat" and therefore, are not permitted in "beef trimmings."

http://www.inspection.gc.ca/english/.../burgere.shtml