I have been seeing more and more supplements in places like Big Lots, Dollar Tree, etc...my question is about their quality. I have heard it both ways. I have heard they are fine and just from stores that liquidated or closed and I have heard that they are usually expired or not as good as other supplements. Certainly, I want to be sure I am getting what I need from a supplement, but if I can get the same thing cheaper, that seems reasonable as well. Any thoughts or experiences?