Can antioxidants reduce heart attack risks?

As I was looking on the NHS website, I came across an article that really interested me.

Antioxidants Article

So, can the fruits and the quantity of these fruits really make a big difference in the likeliness of a hearty attack? According to a study carried out in Karolinska Institute in Sweden, it is perfectly true.

According to them, older women that ate around 7 portions of fruit and vegetable a day had 20-29% reduced risk of an heart attack than those who ate just 2.4 portions.
This statistic is a very large and shows a greatly reduced risk for women. The study used 30,000 women. My greatest concern is, was family history taken into account? Because a huge contributor to heart attacks are our genes. The study is an example of a longitudinal study as it lasted 10 years.

The most interesting part of the article, is that it touches on the idea that there isn't a similar effect achieved by the intake of vitamins or other such supplements. Suggesting that antioxidants have to be sourced from food and that fruit and vegetables can make such a big difference on our health.