"Most of the house brands (such as the vitamin shoppe brand) are just relabeled and they get it from the same source as another well known brand. I would just use that brand if I was you."

Sometimes I think that might be true, but then at other times I think certain brands might be higher quality(either purer, or have better quality excipients). Perhaps this may vary, with certain supplements having just a few manufacturers of the product in bulk to be sold to different brands for tableting or encapsulation, while other substances might have many different manufacturers.