Dr. Vetvicka said, “Yes, to protect yourself against cancer and many other illnesses that would normally be eradicated by a strong immune system. But remember, I am a scientist and not in business selling glucan. I cannot give you any guarantee that you will avoid cancer or any other illness because there is still a lot we do not know. Even though we can say that beta glucans are the most significant anti-cancerous immuno-stimulants we know, they have not been tested against all kinds of cancers. “Also, we are exposed to carcinogens in our everyday life that are extremely powerful. Unless we run tests on beta-glucans against all of them and find they work, we will not be able to say that it is a guarantee against everything. It is certainly effective against many carcinogens, though, so you would greatly reduce your risks of cancer.”