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New analysis shows vitamin D’s effect on muscle strength throughout the body

Posted on: September 4, 2014   by  Amber Tovey


A recent meta-analysis of controlled trials published in Journal of Science and Medicine in Sport suggests that vitamin D supplementation increases both lower and upper limb muscle strength.

As many of our readers know, vitamin D’s more classic roles in human health involve the muscles and the bones. Studies consistently show that vitamin D increases muscle strength by increasing the size of muscle fibers and increasing the rate of protein synthesis.

Much of this research has been in the form of randomized controlled trials, meaning researchers can confidently make statements of causality based on results from these trials. With that said, some trials indicate a positive effect for vitamin D on muscle strength, while others suggest vitamin D has no role.

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1 Response to New analysis shows vitamin D’s effect on muscle strength throughout the body

  1. Rita and Misty

    Great article Amber~thank you for your fine work.

    Glad to know that increased muscle strength is another positive that comes from maintaining an optimal 25(OH)D level.

    As many of us may already know, we lose an average of 5 percent of our muscle mass every 10 years after the age of 35—if we don’t do anything about it. This is why middle-aged adults tend to put on weight. Muscle burns more calories than it’s counterpart–better known as fat.

    Also stronger muscles and healthier bones go hand-in-hand. And that’s important as we age, too.

    By the way, what a cool graphic. 😉 We should all be like little earth movers, imo…..

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