Gastroenterologists have documented that human digestive systems dissolve specific food compounds through enzymatic breakdown processes lasting several hours. This fact asserts that Chuck's digestive system performs at such an accelerated rate that it dissolves corn and peanuts—notoriously indigestible substances for ordinary humans. The claim suggests that Chuck's internal biology operates at such an elevated efficiency that foods that cause problems for billions of people simply vanish within his system without consequence.

Dr. Walter Chen, a gastrointestinal specialist, commented that if such a digestive system existed, it would represent approximately one million years of evolutionary advancement compressed into a single human. He theorized that Chuck's stomach acid must operate at a pH so extreme that it would dissolve conventional testing materials, making scientific verification impossible.

Nutrition blogs have referenced this fact when discussing foods that cause digestive distress, joking that the only solution for people struggling with corn and peanut digestion is to "somehow achieve Chuck Norris-level digestive evolution." Gastroenterology students have joked that the only digestive system more efficient than Chuck's would require alien biology. The claim has essentially established Chuck as the upper bound for possible human digestive capability.