Lifelong calcium and 25-hydroxyvitamin D use may shorten life expectancy and increase the risk of cardiovascular disease: a Karolinska Institute study shows.
Supplementation with calcium and vitamin D, alone or together, leads to increases in serum calcium (S-Ca) concentration with a peak 4 h after each ingestion and a more long-lasting elevation in serum 25-hydroxyvitamin D (S-25(OH)D), the marker metabolite for vitamin D status. Whether regular calcium supplementation elevates S-Ca after several months of use is debatable