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Number 5, Canned tuna. Canned tuna is one of the most misunderstood pantry items because people see it everywhere and assume the supply is simple. It is not. The United States canned tuna shelf depends heavily on imports, global fishing access, foreign canning capacity, compliance paperwork, and metal packaging. Expana reported in August 2025 that the United States market imports roughly 100,000 metric tons of canned or prepared tuna each year from 39 countries. The same report listed Thailand,