Your muscle weakness and mood changes might not be just stress – they could be warning signs of vitamin D deficiency.

When the sun is out, your body can potentially make its own vitamin D, but it still may make sense to continue with ...

Women between ages of 30 and 70 need about 600 international units, and once they're over 70, that number goes up to about ...

Vitamin D deficiency, a widespread global health issue affecting billions, stems from insufficient sunlight exposure, diet, or absorption. Older adults, infants, and those with darker skin are at ...