Despite being essential, vitamin D deficiency is surprisingly widespread around the world. In fact, health experts estimate that about one billion people globally have low vitamin D levels.
Several lifestyle factors contribute to this widespread problem:
Limited Sun Exposure
Vitamin D is known as the “sunshine vitamin” because the body produces it when skin is exposed to sunlight. Spending most of the day indoors reduces natural production.
Poor Dietary Intake
Very few foods naturally contain vitamin D, making it difficult to meet daily requirements through diet alone.
Aging
As people age, the skin becomes less efficient at producing vitamin D from sunlight.
Certain Health Conditions
Digestive disorders, kidney disease, and liver problems can interfere with vitamin D metabolism.
These factors mean that even individuals who eat well may still develop low vitamin D levels
