A single large tomato contains a range of nutrients that may contribute to better health, including the carotenoid lycopene, vitamin C, vitamin K, potassium, folate and other antioxidants, according to a review of clinical guidance by UT Physicians published on 10 August 2026. A registered dietitian at UT Physicians told the outlet that adding a tomato a day is an easy, food-based way to bolster nutrient intake.
What researchers are watching: lycopene
Of the compounds in tomatoes, lycopene attracts the most research attention. Lycopene gives tomatoes their red colour and functions as both an antioxidant and an anti-inflammatory agent. Observational studies and reviews cited by UT Physicians link higher tomato or lycopene consumption with a lower risk of prostate cancer and with improvements in measures associated with that disease.
"Lycopene is anticancer. It’s been found to be beneficial with prostate cancer, in terms of improving prostate cancer status and prevention," said Sharmila Chatterjee, a registered dietitian and certified diabetes care and education specialist at UT Physicians.
The UT Physicians review notes that apparent benefits were stronger in studies where participants ate more tomatoes and in those with longer follow-up periods. This pattern suggests a dose–response relationship and that any protective effect may take time to emerge. However, the review and the dietitian caution that tomatoes are not a cure for cancer; rather, they may help reduce risk or influence disease severity.
Cooking and absorption
How tomatoes are prepared affects how much lycopene the body can use. Heat breaks down plant cell walls and releases lycopene, so cooked tomato products—for example, sauces and stews—tend to provide more bioavailable lycopene than the same weight of raw tomato in a salad. The UT Physicians piece highlights this as a practical consideration when choosing how to include tomatoes in the diet.
Food first: supplements not usually required
Chatterjee told UT Physicians that most people who eat a varied, colourful mix of fruits and vegetables do not need extra vitamin supplements. A tomato a day can contribute to meeting daily vitamin and mineral needs without resorting to isolated nutrient pills.
- Key nutrients: lycopene, vitamin C, vitamin K, potassium, folate and other antioxidants.
- Potential benefits: support for heart health and reduced prostate cancer risk reported in observational studies.
- Preparation matters: cooked tomatoes offer greater lycopene availability than raw tomatoes.
| Preparation | Lycopene availability |
|---|---|
| Raw (e.g. salad) | Lower |
| Cooked (e.g. sauce) | Higher |
Readers should interpret these findings in context. Much of the evidence on tomatoes and disease comes from population studies and reviews that can show associations but cannot by themselves prove direct cause-and-effect. The stronger signals in longer studies and among higher consumers are encouraging, but they do not replace clinical trials that test interventions.
For individuals, the practical takeaway is straightforward: including tomatoes regularly—especially as part of cooked dishes—can be a low-cost, food-based strategy to increase intake of several beneficial nutrients. This advice sits within broader dietary guidance that emphasises variety across fruits and vegetables rather than reliance on a single 'superfood'.
As always, people with specific health conditions or those taking medication should consult a healthcare professional before making substantial changes to diet or beginning supplements.
