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The 1992 Guinness Book of Records records the achievement of a human bite strength of 975 pounds of force (4,337 N) for 2 seconds. What distinguishes the masseter is not anything special about the muscle itself, but its advantage in working against a much shorter lever arm than other muscles.

For comparison, researchers have recorded a bite with 2,125 pounds of force from a 665-pound, 12-foot American alligator. That’s a force equal to the weight of a small pickup truck.