My husbands doctor has encouraged him to try to consume a lot of protein before he begins chemo. Our children which are all in their 30s are doing research on smoothies that we hope discourage the spread of the sarcoma and hopefully find recipes for high protein shakes. We also are researching the spiru tein shake. But I have heard here that some herbs may react to chemo, there are a couple herbs in this shake. . Most doctors are not educated enough about herbs and smoothies and even the right vitamins. So we are learning on our own. His doctor is not sure about these things I mentioned except the protein.