Also known as: Low Vitamin D, Hypovitaminosis D, Sunshine Deficiency
Vitamin D deficiency occurs when the body doesn't get or make enough vitamin D, a hormone essential for calcium absorption, bone health, immune function, and mood regulation. It is one of the most common nutritional deficiencies worldwide, partly because modern lifestyles involve limited sun exposure. Severe deficiency can cause rickets in children and osteomalacia in adults.
This information is for educational purposes only. It is not medical advice. Always consult a qualified healthcare professional for diagnosis and treatment.