Magnesium dosages and necessity

I take mg glycinate 800 mg/day (highly soluble and absorbs well) and I take 3150 mg ca citrate, I have osteopenia and both my mother and father have OSTEOPOROSIS, I had metabolic bone disease before DS, challenging. the stated amount is 2:1 ratio of ca:mg, I do well with the dose I take, even though it is not 2:1. mg is important as it is needed to convert VitD to its active form, supresses PTH, needed for ca absorption, balance for bowel movements, etc. I very closely watch, mg, phos, k, ca, vit d, pth as the relationship of these as they are markers to how well I am absorbing and utilizing my calcium.

I know you may not see this but Thanks for the answer. I haven't seen any studies that support the 2:1 ratio and wonder where exactly people get that from.

I just wanted to say Thank you for all your responses. It's good to know what other people are doing and why they decided on that particular dose / regimen.

Pete