Skip to main content
• Social Media: Connect with UsAccessibility  |  About  |  Contact  |  Privacy  |  Terms

Seniors May Need More Vitamin D to Prevent Mobility Difficulties

  • Published: 2012-06-13 : Wake Forest Baptist Medical Center.
  • Synopsis: Older adults not receiving enough vitamin D from diet supplements or sun exposure at increased risk of developing mobility limitations and disability.
Vitamin D
Vitamin D - Vitamin D is a fat-soluble vitamin that is naturally present in very few foods, added to others, and available as a dietary supplement. It is also produced endogenously when ultraviolet rays from sunlight strike the skin and trigger vitamin D synthesis. Five forms of vitamin D have been discovered, vitamin D1, D2, D3, D4, D5. The two forms that seem to matter to humans the most are vitamins D2 (ergocalciferol) and D3 (cholecalciferol). People who are exposed to normal quantities of sunlight do not need vitamin D supplements because sunlight promotes sufficient vitamin D synthesis in the skin.

Main Document

Older Adults May Need More Vitamin D to Prevent Mobility Difficulties - Older adults who don't get enough vitamin D - either from diet, supplements or sun exposure - may be at increased risk of developing mobility limitations and disability.

Older adults who don't get enough vitamin D - either from diet, supplements or sun exposure - may be at increased risk of developing mobility limitations and disability, according to new research from Wake Forest Baptist Medical Center.

"This is one of the first studies to look at the association of vitamin D and the onset of new mobility limitations or disability in older adults," said lead author Denise Houston, Ph.D., R.D., a nutrition epidemiologist in the Wake Forest Baptist Department of Geriatrics and Gerontology. Houston researches vitamin D and its effects on physical function.

The study, published online this month in the Journal of Gerontology: Medical Sciences, analyzed the association between vitamin D and onset of mobility limitation and disability over six years of follow-up using data from the National Institute on Aging's Health, Aging, and Body Composition ( Health ABC ) study. Mobility limitation and disability are defined as any difficulty or inability to walk several blocks or climb a flight of stairs, respectively.

Of the 3,075 community-dwelling black and white men and women aged 70-79 who were enrolled, data from 2,099 participants was used for this study. Eligible participants reported no difficulty walking one-fourth mile, climbing 10 steps, or performing basic, daily living activities, and were free of life-threatening illness. Vitamin D levels were measured in the blood at the beginning of the study. Occurrence of mobility limitation and disability during follow-up was assessed during annual clinic visits alternating with telephone interviews every six months over six years.

"We observed about a 30 percent increased risk of mobility limitations for those older adults who had low levels of vitamin D, and almost a two-fold higher risk of mobility disability," Houston said.

Houston said vitamin D plays an important role in muscle function, so it is plausible that low levels of the vitamin could result in the onset of decreased lower muscle strength and physical performance. Vitamin D may also indirectly affect physical function as low vitamin D levels have also been associated with diabetes, high blood pressure, cardiovascular disease and lung disease - conditions that are frequent causes of decline in physical function. Houston said people get vitamin D when it is naturally produced in the skin by sun exposure, by eating foods with vitamin D, such as fortified milk, juice and cereals, and by taking vitamin D supplements.

"About one-third of older adults have low vitamin D levels," she said. "It's difficult to get enough vitamin D through diet alone and older adults, who may not spend much time outdoors, may need to take a vitamin D supplement."

Current recommendations call for people over age 70 to get 800 International Units of vitamin D daily in their diet or supplements. Houston pointed out that current dietary recommendations are based solely on vitamin D's effects on bone health.

"Higher amounts of vitamin D may be needed for the preservation of muscle strength and physical function as well as other health conditions," she said. "However, clinical trials are needed to determine whether increasing vitamin D levels through diet or supplements has an effect on physical function."

This research was supported in part by:

Co-authors include: Janet A. Tooze, Ph.D., Gary G. Schwartz, Ph.D., Jeff D. Williamson, M.D., Stephen B Kritchevsky, Ph.D., Rebecca H. Neiberg, Ph.D. and M. Kyla Shea, Ph.D., all of Wake Forest Baptist; Dorothy B. Hausman, Ph.D., and Mary Ann Johnson, Ph.D., University of Georgia, Athens; Jane A. Cauley, Ph.D., University of Pittsburg, Pennsylvania; Doug C. Bauer, M.D., University of California, San Francisco; and Tamara B. Harris, M.D., National Institute on Aging.

Similar Topics

1 - Widespread Vitamin D Deficiency Likely Due to Sunscreen Use and Increase of Chronic Diseases - American Osteopathic Association.
2 - Vitamin D and Alzheimer's Disease - Thomas C. Weiss.
3 - Daily Multivitamin Can Reduce Cancer Risk - David Stauth.
4 - Seniors May Need More Vitamin D to Prevent Mobility Difficulties - Wake Forest Baptist Medical Center.
5 - Cancer Patients and Vitamin D Deficiency - American Society for Radiation Oncology.
From our Vitamins - Types, Sources and Benefits section - Full List (26 Items)

Submit disability news, coming events, as well as assistive technology product news and reviews.


Loan Information for low income singles, families, seniors and disabled. Includes home, vehicle and personal loans.


Famous People with Disabilities - Well known people with disabilities and conditions who contributed to society.


List of awareness ribbon colors and their meaning. Also see our calendar of awareness dates.


Blood Pressure Chart - What should your blood pressure be, and information on blood group types/compatibility.



1 - wheelAIR Innovative New Cooling Wheelchair Backrest Wins Support on Dragons Den
2 - DIVAS Rule the Runway at The Woodlands
3 - Ultra-thin Optical Fibers Provide Way to Print 3D Microstructures
4 - Brain Imaging Predicts Language Learning in Deaf Children
5 - Asthma Costs US Economy Over $80 Billion a Year



Citation


Disclaimer: This site does not employ and is not overseen by medical professionals. Content on Disabled World is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. See our Terms of Service for more information.

Reporting Errors: Disabled World is an independent website, your assistance in reporting outdated or inaccurate information is appreciated. If you find an error please let us know.