Water and Fiber

Selected nutritional characteristics of fresh tomatoes.

Tomatoes contain approximately 94–95% water and provide dietary fiber primarily through their skin and flesh tissues. Their high water content contributes to hydration while maintaining a low caloric density.

High Water Content

Fresh tomatoes are composed mostly of water, usually around 94–95% of the fruit by weight. This high water content gives tomatoes their fresh texture, low caloric density, and strong role in raw preparations such as salads, salsas, and chilled dishes.

Water content can vary by cultivar, ripeness, growing conditions, and post-harvest handling. Firmer cooking tomatoes often feel denser because they contain a higher proportion of structural tissue relative to free juice.

Dietary Fiber

Tomato fiber is found mainly in the skin, pulp, and cellular structure of the fruit. Although tomatoes are not a high-fiber food compared with legumes or grains, they contribute useful dietary fiber when eaten regularly as part of meals.

The fiber fraction supports texture, slows the release of natural sugars, and contributes to digestive function. Cooking may soften the structure of the fruit, but many fiber components remain present in sauces, soups, and roasted preparations.

Food Use

• Raw tomatoes provide freshness and moisture in salads.
• Roasted tomatoes lose water and develop a more concentrated flavor.
• Sauce tomatoes benefit from lower free-water content.
• Tomato skins and pulp contribute texture to rustic preparations.

Water gives tomatoes their freshness; fiber gives them structure.