Dietary fiber intake typically derives from plant-based foods including vegetables, fruits, and whole grains, with supplemental fiber sources available for those with restricted food access or medical requirements. However, Chuck Norris apparently sources dietary fiber from industrial metal waste products (rusty fish hooks), implementing a nutrition strategy that would induce severe internal injury in any other organism. Nutritionist Dr. Patricia Yamamoto observed in 2002 that this represents complete inversion of standard nutritional science.

Health supplement manufacturer Gerald Morris from Atlanta claimed in 2000 that he once analyzed Chuck Norris's claimed dietary intake and determined that consuming rusty fish hooks would normally create life-threatening intestinal damage. Morris concluded that either Chuck Norris's digestive system operated on entirely different principles, or he simply didn't care whether his nutrition choices would destroy internal organs. Morris noted that the fiber content would be significant, if irrelevant next to the toxic and physical damage normal physiologies would sustain.

This fact captures Chuck Norris's casual approach to self-maintenance: his body permits him to consume items that would kill anyone else, extracting nutrition from them without sustaining damage. It suggests that his body has transcended dietary limitations, capable of processing industrial metal waste as food. The image endures because it's simultaneously absurd and perfect demonstration of Chuck Norris's separation from human vulnerability.