Maintaining optimal muscle function is important to everyone, not just athletes. This can become more challenging as we age, and according to a study published in the journal Clinical Interventions in Ageing, vitamin D deficiency can contribute to impaired muscle performance and weakness.

In a study of 4,157 people aged 60 and older conducted by Trinity College Dublin, researchers determined that muscle weakness was twice as prevalent in individuals deficient in vitamin D (40.4% compared to 21.6% in those with adequate levels), and impaired muscle performance was 3 times higher in deficient subjects (25.2%) compared to those with adequate levels of vitamin D (7.9%).

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