what is the right food to eat ?

I read an article by Keenu, the actor for Matrix . He donated 70% of his earnings from Matrix to charity and now he is worth about US$100 million. He said that his mother is suffering from Caner despite taking only healthy food in all her life. Is purely healthy food good for health? He disagreed with this notion. He believed that all human beings must taking some poison each day and let their immune system work and the body will be healthier and stronger. He cited the example of his mother who only take healthy food but in the end she faced cancer and some many of the sickness. I remembered when I was young, my mother's generation , they consumed a lot of pork. Not just pork by fatty pork and all the people during her generation live into a ripe old age and remained healthy. Now, we talk about supplements to avoid or neutralize the food we take to avoid high blood pressure, cholesterol, diabetes ,etc. In the past , there is only natural herbal medicine to take care of these problems. The big medical product factories are churning out more and more tablets of supplements and make billions in process through advertisement and on-line sales and making all disease as deadly while producing the pills. It is a wonder how the world has changed and supplements have become a necessity instead of a need. Namaste.