Skip to main content
Evidence-Based Supplement Research
Evidence-Based Supplement Research

Vitamin D Deficiency

Vitamin D deficiency, or hypovitaminosis D, occurs when a person has insufficient levels of vitamin D, commonly due to inadequate sunlight exposure, poor dietary intake, or certain medical conditions. This deficiency impairs bone mineralization, potentially leading to bone-softening diseases such as rickets in children, and osteomalacia and osteoporosis in adults, as well as increasing the risk of fractures and muscle weakness.

Health Outcomes

Back to top