Low vitamin K may reduce mobility in older adults
Dietary sources of vitamin K include kale, spinach, broccoli, and other leafy greens. Some dairy foods also contain vitamin K. The investigators who carried out the study say that their findings "suggest vitamin K may be involved in the disablement process in older age." They describe their work in a paper that features in a recent issue of The Journals of Gerontology: Series A. Previous studies have established links between vitamin K and long-term conditions that can raise the risk of mobility disability.
These conditions include cardiovascular disease and osteoarthritis. However, none of those earlier investigations had examined the relationship between vitamin K and mobility disability directly.
The new evidence builds on earlier studies that have associated low levels of circulating vitamin K with "slower gait speed and a higher risk of osteoarthritis," Shea explains. Researchers typically define mobility as the "ability to move independently" from one place to another.