One tomato eaten before lunch can reduce body weight ONE kg after a month without changing anything else in the diet![That does not mean that one should not always try to eat healthy!]
For prostate cancer prevention [and possibly treatment] tomato paste [cooked] with some olive oil is one of the best things one can do. by

Notably, the risk of progressive prostate cancer is reduced.
Cholesterol, triglycerides, and blood sugar are all improved with tomatoes in the diet.
Tomatoes work especially on abdominal fat
Don’t store tomatoes in the fridge
To maintain the best taste and texture of tomatoes, storing them at room temperature is generally recommended. If you have ripe tomatoes that you want to keep for a longer period, you can store them in a cool, dark place, such as a pantry or a cellar. Please make sure to use them before they become overripe