Went and skimmed through the published study, looking for the amount of vitamin D dosage. Study results were based on 10ug/day of D, along with calcium supplement. That’s only 400 IU of vitamin D.
Many experts in this area of research advise up to 5000 IU daily, to avoid deficiency. At this purported optimum vitamin D dosage, the body’s usage of calcium is optimized, too, so a calcium supplement should not be needed. I’d be wary of taking calcium along with high vitamin D supplements.
Well, there's an older study of just postmenopausal women. The results are in the Feb. 16, 2006 edition of The New England Journal of Medicine. Data from that study was included in the results of this study reported in the British Medical Journal. I'm seeing dosages of more than just 400 IU of vitamin D.
Many experts in this area of research advise up to 5000 IU daily, to avoid deficiency. At this purported optimum vitamin D dosage, the body’s usage of calcium is optimized, too, so a calcium supplement should not be needed. I’d be wary of taking calcium along with high vitamin D supplements.
You may be right about amounts of calcium but you do need calcium for it to be used. That taking more vitamin D should dictate limiting calcium intake is something I would dispute. If vitamin D optimizes calcium usage then what is the best amount of calcium to take should be independent of the amount of vitamin D.