How Exercise Helps Maintain Healthy Vitamin D Levels in the Wintertime

During winter in northern climates, sunlight is too weak to trigger vitamin D production, leaving many people — especially those with excess body fat — at risk for deficiency A 10-week study found that exercise alone, without supplements or weight loss, helped maintain levels of active vitamin D in overweight or obese adults Physical activity altered enzyme activity in fat tissue, boosting the body's ability to convert stored vitamin D into its usable form and preventing it from being broken down People with the most fat tissue saw the biggest improvements in vitamin D activation, showing that exercise is especially important if you're carrying extra weight Exercise trains your body to activate and protect the vitamin D it already has, offering a natural way to help maintain vitamin D levels through winter when sun exposure is limited

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