VDC test kit slider
VDC-Banner-new_468
VDC test kit slider
sunfriend-banner
sperti-banner

Low dose vitamin D, calcium disappoint in dementia study

Posted on: December 7, 2012   by  Vitamin D Council

img

A recent study found that low doses of vitamin D and calcium taken together offered little protection against dementia for older women.

The randomized, double-blind, placebo-controlled trial included 4,143 women aged 65 and older without cognitive impairment at the start of the study. The women were randomly assigned to a treatment group supplemented with 400 IU vitamin D and 1,000 mg calcium or a control group taking a placebo. The participants supplemented daily for an average of 8 years.

The researchers found that the women supplementing with vitamin D and calcium developed cognitive impairments at the same rate as those in the placebo group.

“I think the definitive study will just look at the effects of vitamin D,” said lead author Dr. Rebecca Rossom.

Katherine Tucker of Northeastern University, who was not involved in the study stated, “Some recent studies suggest that too much calcium could have negative effects. The preponderance of evidence shows that vitamin D is protective, but some studies have shown no effect.”

The researchers recognize that since the study ended, the Institute of Medicines recommendation for vitamin D for people over 70 years has increased to 800 IUs. They point out that their study findings are only relevant to women taking the low amounts of vitamin D and calcium.

Study coauthor JoAnn Manson of Harvard Medical School concluded,

“The next step is to test a higher dose of vitamin D. Higher doses will bring a study population to an achieved blood level that has been associated with reduced risk of cognitive decline in (past) studies.”

Sources:

Raven K. Vitamin D, calcium disappoint in dementia study. Reuters. December 6, 2012.

Rossom RC, et al. Calcium and vitamin D supplementation and cognitive impairment in the Women’s Health Initiative. Journal of the American Geriatrics Society. Nov 2012.

Test Your Vitamin D Levels at Home!

Our in-home Vitamin D Test Kit is easy, affordable, and an accurate way to find out your Vitamin D status.

order NOW

We need your help!

We're spreading awareness on Vitamin D Deficiency
Donate NOW
Latest Articles
img
Vitamin D may help treat periodontitis

A new study proposes a mechanism to explain to the role of vitamin D in the treatment of periodontitis.

Weekly Newsletter