Dave... Please be sure to talk to your doctors about any additional supplements that you are taking. You would be surprised at how they can impact treatments and more. For instance it is well established that with some drugs, grapefruit increases the effect of the drug... This is not always a good thing. When in doubt, your doctors will thumbs up or down any adjunctive herbs, vitamins, etc. that you wish to take. Some are definitely worthwhile, some you have to watch out for.