According to this article, they certainly can! Tomatoes and olive oil lead the pack.
According to the article, “Tomatoes are rich in an antioxidant called lycopene, which has been shown to improve vascular function and help protect against disease.”
And for olive oil, “Swapping out butter, which is rich in saturated fats, for something that’s rich in monounsaturated fats like olive oil can also help reduce your risk of heart disease. In one evaluation, researchers found that increasing olive oil consumption by as little as 5 grams (for context, a tablespoon contains 13.3 grams) was associated with a 7% reduction of CHD incidence, a 4% reduction of CVD incidence, and an 8% reduction of death from CVD.”
