There are several good systemic enzymes on the market, like Bragg's and others. They all claim to be the best. I recommend liquid minerals from a plant source. Clarks is one, but there are others. Cancer is a disease that starts when the body is to acidic. When the body gets acid it pulls minerals out of the body to keep the blood at 7.365. When the body starts pulling minerals out of the cells, the no longer function properly and do things like mutate and those mutations are cancer because of a lack of minerals being used to keep the blood alkaline. Ask a doctor what causes cancer and he will say duh, nobody knows, genes probably but we don't really know, DUH. Just killers in white coats.