ROSEMONT, Ill., April 16, 2018 /PRNewswire-USNewswire/ -- Vitamin D contributes to many important functions in the body, including the absorption of calcium and improvement of bone strength. According to a new review article published in the April 15, 2018, issue of the Journal of the American Academy of Orthopaedic Surgeons (JAAOS), vitamin D supplements help to increase muscle strength in athletes who are vitamin D deficient. Higher vitamin D levels have also been linked to reducing injury and improving athletic performance.
"Vitamin D deficiency commonly affects many people around the world," said lead study author and orthopaedic surgeon Geoffrey D. Abrams, MD. "With higher serum levels of vitamin D playing a role in muscle strength, injury prevention, and sports performance, it's essential for individuals to take necessary steps to ensure they're getting an adequate amount of vitamin D intake, whether through direct sunlight or other sources including fish, eggs, fortified dairy products, and dietary supplements. Studies also have shown that daily vitamin D supplements are proven to be more effective than weekly or monthly doses."
Vitamin D is measured using the 25-hydroxy vitamin D test using nanomoles per liter (nmol/L) or nanograms per milliliter (ng/mL). According to the Endocrine Society's clinical practice guideline for the evaluation, prevention, and treatment of vitamin D deficiency,
People with very low vitamin D blood levels may be more likely to experience muscle cramps, bone pain, or joint pain. The review article authors highlight findings across several studies to determine the effect of vitamin D in three categories:
"While vitamin D supplementation improves function and decreases fracture risk in people who are vitamin D deficient, it's important for individuals to be aware of the safe dosage amount, which varies with age and the status of an individual's current vitamin D level," explains Dr. Abrams. "We are not advocating for athletes to take additional vitamin D without first speaking with a doctor."
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DisclosuresFrom the Department of Orthopaedic Surgery (Dr. Abrams and Dr. Safran) and the Department of Medicine, Division of Endocrinology, Gerontology, and Metabolism (Dr. Feldman), Stanford University School of Medicine, Palo Alto, CA, and VA Palo Alto Healthcare System, Palo Alto (Dr. Abrams). J Am Acad Orthop Surg 2018;26(8):278–285 DOI: 10.5435/JAAOS-D-16-00464 Copyright 2018 by the American Academy of Orthopaedic Surgeons.
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SOURCE American Academy of Orthopaedic Surgeons
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