Tomatoes are one of the most common ingredients in everyday cooking and are valued for their vitamins, minerals, and especially lycopene, a powerful antioxidant linked to heart health and protection against cellular damage. However, the way tomatoes are eaten can influence how beneficial they are.

In some cases, improper preparation or consumption may reduce their nutritional value or cause digestive discomfort. Research suggests that cooked tomatoes may provide greater lycopene benefits than raw ones. Lycopene is stored inside tomato plant cells, and heat helps break down those cell walls, allowing the body to absorb the antioxidant more easily.

Cooking tomatoes with a small amount of healthy fat, such as olive oil, can significantly increase lycopene absorption compared with eating them raw.

Raw tomatoes still have important benefits, including vitamin C, water, and fiber. Cooked tomatoes may be the better option when the goal is stronger antioxidant support, while raw tomatoes may be preferred for higher vitamin C content and fresh, fiber-rich foods.

Some common mistakes can reduce the benefits of tomatoes or cause discomfort. Eating raw green tomatoes can expose the body to solanine, a natural compound that may irritate the stomach when consumed in larger amounts. Another issue is eating raw tomatoes on an empty stomach, which may increase stomach acidity and lead to pain, bloating, nausea, or irritation in some people.

Overcooking tomatoes or reheating them repeatedly can also reduce their nutritional quality. Vitamin C is sensitive to heat, and prolonged cooking can lower its content. Reheating tomato dishes several times may also break down fats in the meal and create less healthy compounds.

For the best results, choose ripe, evenly red tomatoes and store them at room temperature in a cool, airy place. While tomatoes are healthy for most people, individuals with acid reflux, stomach ulcers, or advanced kidney disease may need to be more cautious with how often and how much they consume.