Calories in Tomato, paste

What makes tomato so powerful?

Tomato paste is essentially fresh tomatoes stripped of their water content, resulting in a dense concentrate that packs intense umami and nutritional value. The most notable chemical transformation occurs with lycopene, the carotenoid responsible for the fruit's red color. In raw tomatoes, lycopene exists primarily in a trans-isomer form, which is tightly bound to the plant's cell structure and poorly absorbed by the human digestive tract. The prolonged heating process used to make tomato paste breaks down cell walls and induces an isomerization process, converting much of the trans-lycopene into the cis-isomer form. This structural change makes the antioxidant substantially more bioavailable. Additionally, because tomato paste is concentrated, a single tablespoon can deliver as much lycopene as several whole raw tomatoes. The Maillard reaction also plays a role during the initial cooking stages, creating complex flavor compounds that give the paste its deeply savory, slightly caramelized profile. This makes it not just a thickening agent, but a foundational flavor base for cuisines worldwide.