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Home » Vitamin D deficiencies hurt mobility

Vitamin D deficiencies hurt mobility

Study finds high percentage of seniors who lack nutrient struggle with everyday tasks

August 1, 2013
News Wise

Vitamin D-deficient older individuals are more likely to struggle with everyday tasks such as dressing or climbing stairs, says a recent study accepted for publication in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism (JCEM).

Scientists estimate as many as 90 percent of older individuals are vitamin D deficient. The vitamin, typically absorbed from sunlight or on a supplementary basis through diet, plays a key role in bone and muscle health. Vitamin D deficiency can lead to a decline in bone density, muscle weakness, osteoporosis, or broken bones.

"Seniors who have low levels of vitamin D are more likely to have mobility limitations and to see their physical functioning decline over time," says the study's lead author, Evelien Sohl, of VU University Medical Center in Amsterdam, the Netherlands. "Older individuals with these limitations are more likely to be admitted to nursing homes and face a higher risk of mortality."

Using data from an ongoing Dutch cohort study, called The Longitudinal Aging Study Amsterdam, the researchers examined two groups—762 people between the ages of 65 and 88, and 597 people between the ages of 55 and 65—during a six-year period.

Using blood test results, the subjects were split into groups with the highest, moderate, and lowest vitamin D levels. To assess mobility limitations, participants were asked about their ability to perform routine tasks, including sitting down and standing up from a chair or walking outside for five minutes without resting.

Among the older group of participants, people with the lowest vitamin D levels were 1.7 times more likely to have at least one functional limitation compared to those with the highest vitamin D levels. In the younger cohort, individuals with low vitamin-D levels were twice as likely to have at least one physical limitation.

While the majority of the people in the older cohort's top two vitamin D groups didn't report any physical limitations, 70 percent of the people with the lowest vitamin-D levels had at least one limitation.

In addition, the study found vitamin D-deficient individuals were more likely to develop additional limitations over time. The older group reported more mobility issues after three years, while the younger cohort developed additional limitations during a six-year period.

"The findings indicate low vitamin D levels in older individuals may contribute to the declining ability to perform daily activities and live independently," Sohl says. "Vitamin D supplementation could provide a way to prevent physical decline, but the idea needs to be explored further with additional studies."

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