Thanks, Sue. I started taking mag supplements before Covid after reading the book "The Magnesium Miracle" in which the author explained, in detail, the balance required between the various supplements. I certainly don't want to contribute to calcium deposits in my vessels. There have been so many bad things associated with the pandemic and our government's terrible response, but having substacks like this one and eugypius and Alex Berenson have afforded me the opportunity to learn so much from commenters like you. Thanks for taking the time to respond!