They may increase the risk of kidney stones compared to dietary calcium
, which reduces kidney stone risk.
A survey of 9475 US adults figured median daily dietary calcium
intakes of 968 mg for 31- to 40-year-olds, 852 mg for 41- to 50-year-olds, 777 mg for 51- to 60-year-olds, and 735 mg for 71- to 80-year-olds.
If your dietary calcium
intake is low and you can't meet the RDA through your food choices, a low-dose calcium supplement can help to make up the difference.
Pettifor's major research interests have focused on metabolic bone diseases in children, and in particular the roles of vitamin D and dietary calcium
intake in the pathogenesis of rickets.
Comparison of dietary calcium
with supplemental calcium and other nutrients as factors affecting the risk for kidney stones in women.
Effects of dietary calcium
, phosphorus, calcium:phosphorus ratio and vitamin K on performance, bone strength and blood clotting status of pigs.
But in the present German study, no overall statistically significant correlation--negative or positive--was found between total, dairy, or non-dairy dietary calcium
intake and CVD mortality.
With the coronary artery calcium scores (CACS) that were greater than 100 including different calcium intakes, dietary calcium
intake was not significantly associated with CACS in either men or women.
In contrast, the intake of dietary calcium
has no apparent effect on cardiovascular disease (CVD) mortality in either sex, said Qian Xiao, Ph.
Additionally, after decades of rising dietary calcium
intake not balanced with rising dietary magnesium intake, and a population wherein a majority of US adults are not getting their daily magnesium requirement, dietary calcium
-to-magnesium ratios are on the rise, and studies are showing that calcium supplements not balanced with magnesium increase the risk of heart disease," says Rosanoff.
Research from additional studies also suggest that ingested marine hydrolyzed collagen has anti-inflammatory properties, that it may improve the absorption of dietary calcium
, and that it has hydrating properties when applied topically.
They suggested that "Increasing dietary calcium
intake from (the) diet might not confer significant cardiovascular benefits, while calcium supplements, which might raise MI risk, should be taken with caution.
But the new research from Germany points to a vital difference between dietary calcium
from sources such as milk, cheese, greens and kale, and supplements.
Professor Sabine Rohrmann, from the University of Zurich, Switzerland, wrote in the online edition of the journal Heart: "In conclusion, this study suggests that increasing dietary calcium
intake might not confer significant cardiovascular benefits, while calcium supplements, which might raise MI (myocardial infarction, or heart attack) risk, should be taken with caution.
The real story on calcium is not so simple, however, and scientists are still trying to sort out the good and bad of both dietary calcium
and calcium supplementation.