I took 800 mg calcium (supplements, I can't eat dairy, and on Tymlos I took less than the 1200mg recommended and my calcium stayed around 10. It is important not to take calcium 24-48 hours before the test (I forget which!) and also have the blood test before Tymlos. I was told calcium levels go up right after the injection for a couple of hours and then go down.

Not sure if this is relevant for you!