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Vitamin D Deficiency Associated With Functional Limitations in Individuals 55+

A new study published in The Journal of Clinical Endocrinology & Metabolism examined the correlation between vitamin D and muscle health.

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By: Sean Moloughney

Editor, Nutraceuticals World

A new study published in The Journal of Clinical Endocrinology & Metabolism examined the correlation between vitamin D and muscle health. While it’s known that a reduction in muscle mass increases the risk of functional limitations among older individuals, the study’s objective was to further examine how vitamin D influences possible functional limitations.
 
Researchers examined two independent cohorts of the Longitudinal Aging Study Amsterdam. Participants were aged 65 to 88 years (older cohort, n = 1237; baseline 1995) and 55 to 65 years (younger cohort, n = 725; baseline 2002). Questions on the ability and degree of difficulty to perform 6 functions of daily life were asked.
 
Results of this evaluation found that of the participants, 56% in the older cohort and 30% in the younger cohort had ≥1 limitation. Vitamin D deficiency (25-hydroxyvitamin D level of 30 ng/mL) was related to the presence of functional limitations at baseline (odds ratio [OR] = 1.7; 95% confidence interval [CI], 1.2–2.5 and OR = 2.2; 95% CI 1.3–3.7 for the older and younger cohorts, respectively). In the older cohort, vitamin D deficiency was associated with an increase in limitations at 3 years (OR = 2.0; 95% CI, 1.1–3.5), whereas vitamin D deficiency in the younger cohort was associated with an increase in limitations at 6 years (OR = 3.3; 95% CI, 1.1–10.1). Analyses were adjusted for confounders.
 
In conclusion, it was determined that vitamin D status is associated with functional limitations cross-sectionally and longitudinally in individuals aged 55 to 65 years and those 65 years and older. The possible association of vitamin D with functional limitations is present after a shorter follow-up time in the oldest age group compared with the younger age group.

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