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Low Vitamin D Tied to Cognitive Decline in Elderly

Low Vitamin D Tied to Cognitive Decline in ElderlyAlthough vitamin D deficiency and cognitive impairment are common in elders, prior research has failed to determine whether there’s a relationship between the two.

In a new study, researchers from Wake Forest Baptist Medical Center found evidence that there is an association between low vitamin D levels and cognitive decline over time.

“Although this study cannot establish a direct cause and effect relationship, it would have a huge public health implication if vitamin D supplementation could be shown to improve cognitive performance over time because deficiency is so common in the population,” said lead author Valerie Wilson, M.D.

Wilson and colleagues were interested in the association between vitamin D levels and cognitive function over time in older adults.

They used data from the Health, Aging and Body composition (Health ABC) study to look at the relationship.

The researchers looked at 2,777 well-functioning adults aged 70 to 79 whose cognitive function was measured at the study’s onset and again four years later. Vitamin D levels were measured at the 12-month follow-up visit.

The Health ABC study cohort consists of 3,075 Medicare-eligible, white and black, well-functioning, community-dwelling older adults who were recruited between April 1997 and June 1998 from Pittsburgh, Pa., and Memphis, Tenn.

“With just the baseline observational data, you can’t conclude that low vitamin D causes cognitive decline. When we looked four years down the road, low vitamin D was associated with worse cognitive performance on one of the two cognitive tests used,” Wilson said.

“It is interesting that there is this association and ultimately the next question is whether or not supplementing vitamin D would improve cognitive function over time.”

Wilson said randomized, controlled trials are needed to determine whether vitamin D supplementation can prevent cognitive decline and definitively establish a causal relationship.

“Doctors need this information to make well-supported recommendations to their patients,” Wilson said.

“Further research is also needed to evaluate whether specific cognitive domains, such as memory versus concentration, are especially sensitive to low vitamin D levels.”

Study results have been published online ahead of print in the Journal of the American Geriatrics Society.

Source: Wake Forest Baptist Medical Center

 
Vitamin D pill photo by shutterstock.

Low Vitamin D Tied to Cognitive Decline in Elderly

Rick Nauert PhD

Rick Nauert, PhDDr. Rick Nauert has over 25 years experience in clinical, administrative and academic healthcare. He is currently an associate professor for Rocky Mountain University of Health Professionals doctoral program in health promotion and wellness. Dr. Nauert began his career as a clinical physical therapist and served as a regional manager for a publicly traded multidisciplinary rehabilitation agency for 12 years. He has masters degrees in health-fitness management and healthcare administration and a doctoral degree from The University of Texas at Austin focused on health care informatics, health administration, health education and health policy. His research efforts included the area of telehealth with a specialty in disease management.

APA Reference
Nauert PhD, R. (2015). Low Vitamin D Tied to Cognitive Decline in Elderly. Psych Central. Retrieved on August 13, 2018, from https://psychcentral.com/news/2014/04/17/low-vitamin-d-tied-to-cognitive-decline-in-elderly/68615.html

 

Scientifically Reviewed
Last updated: 6 Oct 2015
Last reviewed: By John M. Grohol, Psy.D. on 6 Oct 2015
Published on PsychCentral.com. All rights reserved.