Most studies have shown the effect of different foods in preventing cancer, but with some foods they are helping only in certain types of cancer and in high amounts. Quite few foods have any effect on an excisting cancer and they are not curing the cancer alone.

Helping to cure cancer (along with some real treatments) is one thing, but showing off something as a savior against cancer is completely wrong.

I'm a commoner but I have more common sense and knowledge in scientific processes to understand how science works :D Some take a single study as a 100% sure proof, even though there'd be a load of studies that have had completely different results. I'm trying to keep my eyes open for facts instead of holding onto my beliefs.