I think that's true. In my specific case, I'm interested in treatment (removal) of plaque calcium. Ocassionally I read about progress in disolving plaque calcium, but then, the interest seems to wane. I have 100% blockage in one artery, and I'm told that there is nothing that can be done without creating a very risky situation. There is also some discussion of vitamin K being an agent for dissolution of Calcium, but there are some credible sources that imply that that borders on witchcraft.