"Many Americans are deficient in vitamin D due to limited sun exposure from indoor lifestyles, sunscreen use and our northern ...

A 2019 study in 480 older adults linked vitamin D deficiency with fatigue symptoms. A 2020 study in 39 children associated low vitamin D levels with poor sleep quality, shorter sleep duration, and ...

A vitamin D deficiency is common, and it can lead to further health issues. Still, many people with the deficiency have no symptoms. Learn more here.

Chronic vitamin D deficiency can cause rickets, which is a softening of bone tissues as well. Fatigue, loss of appetite, ...

Slower-than-normal nail growth, brittle edges or unusual ridges may indicate more than cosmetic concerns. These changes might ...

Discover the top reasons why you get white spots on your nails, from frequent manicures to vitamin deficiencies, and how to ...

Vitamin D deficiency, a widespread issue affecting billions globally, stems from insufficient sunlight exposure, diet, or absorption. It particularly impacts older adults and those with darker ...

“The majority of patients with [mild-to-moderate] vitamin D deficiency have no symptoms,” says Allyson Ocean, M.D., a gastrointestinal oncologist at Weill Cornell Medicine based in New York City.