Ketchup is a factory-made condiment made from refined sugar, high-fructose corn syrup, and vegetable seed oils. You're essentially consuming a sweet, oily syrup with a hint of tomato flavor. Real tomatoes are a nutritious choice, but ketchup is a far cry from that.
Why trash
More sugar per tablespoon than ice cream. Tomato-flavored candy sauce.
Try instead
Tomato sauce made with fresh tomatoes, olive oil, and salt.