Definition & Meaning of "vitamin D"

What is "vitamin D"?

Vitamin D is an essential nutrient that plays a crucial role in maintaining bone health by helping the body absorb calcium. It also supports immune function, muscle health, and overall well-being. The body can produce vitamin D when the skin is exposed to sunlight, but it can also be obtained from foods such as fish, fortified dairy products, and egg yolks, as well as supplements. Getting enough vitamin D is important to prevent conditions like rickets in children and osteoporosis in adults, ensuring strong bones and a healthy immune system.