What is the primary ingredient in Ketchup?

The primary ingredient in ketchup is tomato. This fruit serves as the main component, providing the base for the condiment's distinctive flavor and texture. Tomatoes are rich in water content, which contributes to the smooth consistency of ketchup, while also providing acidity and sweetness that balance the overall taste. Other ingredients like vinegar, sugar, and various spices are added to enhance flavor, but the essence of ketchup is derived from tomatoes, making them the foundational ingredient in traditional recipes. Understanding this helps in recognizing that while other ingredients play a role in the final product, it is the tomato that defines ketchup.