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Vitamin D2 Supplementation Worsens Muscle Damage From Heavy Lifting

January 27, 2014: 12:00 AM EST
Research conducted at a North Carolina university found that “power athletes” – intense weight lifters and auto racing pit crews, for example –  would be better off staying away from vitamin D2 supplements. The study was conducted among NASCAR pit crew athletes, half of whom consumed 3,800 international units (IU) a day of a plant-based vitamin D2, the other half a placebo. The researchers thought taking vitamin D2 would reduce inflammation and speed recovery of muscle damage from heavy lifting. Instead, the supplement increased exercise-induced muscle damage in the pit crew athletes.
David Nieman et al., "Vitamin D2 Supplementation Amplifies Eccentric Exercise-Induced Muscle Damage in NASCAR Pit Crew Athletes", Nutrients, January 27, 2014, © MDPI AG
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