This is a really offensive comment... Plants create compounds to battle pests and radiation from the sun. A lot of these compounds such as anthocyanins and phenols are extremely beneficial to healthy humans. Definitive science is actually still catching up.
What he said isn't offensive at all. The mothers that make their kids eat all sorts of unproven remedies, trying to stay ahead of proven science, are just as bad as the ones that refuse injections, trying to stay behind proven science.
Down vote me all you want, but there is a reason why science exists and has rigorous testing methodologies.
http://en.wikipedia.org/wiki/Anthocyanin http://en.wikipedia.org/wiki/Phenol