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8 Signs You Need to Be Getting More Vitamin D

Women's Health Logo By Katy Lindenmuth, Women’s Health of Women's Health | Slide 1 of 8

Muscle weakness

Decreased muscular size can be the result of not enough vitamin D in muscle and nerve tissue, says Kimberly Mueller, R.D., owner of Fuel Factor Nutrition Coaching. So if you notice that you can't eek out the same number of reps you've always done, that may be a sign you need more vitamin D.
© Richard Baker | Corbis

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