I had a TT in 2007, with a calcium infusion after surgery. Within the last 6-8 months its been picked up on a blood test that my calcium & vitamin d levels are very low. I have been on Calcitrol .25 (from today .50) and 4 ad-cal tabs daily since November. The Dr explained that i should space out my meds as some of them affect each other. Anyway my question is despite being on the supplements & being a pretty good milk drinker how come im still low. Am I not producing/absorbing calcium or what tests can be done to find this out??