A lack of vitamin D can have an adverse effect on your athletic performance, according to the journal, Nutrients. Additional research corroborates these findings, showing that there is a positive correlation between vitamin D levels and muscle strength.
According to the National Health and Nutrition Examination Survey (NHANES), at least 77% of Americans are vitamin D deficient. This is especially true in the northern states, where exposure to sunshine can be scarce during the winter season (the sun plays a vital role in your body’s natural vitamin D production).
You can boost your vitamin D by increasing your consumption of whole foods like fatty fish (mackerel, salmon, and tuna), milk (and other fortified dairy products), eggs, and oatmeal (and other fortified cereals).
You can also improve your vitamin D level by adding a supplement to your daily diet. Aim for at least 600 IU per day.
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