Vitamin D3 Deficiency

Vitamin D3 deficiency occurs when the body lacks sufficient levels of vitamin D3 (cholecalciferol), which is essential for calcium absorption, bone health, and immune function. A deficiency can lead to weakened bones, increased risk of fractures, muscle weakness, and a greater susceptibility to infections. In children, severe deficiency can cause rickets, while in adults, it may lead to osteomalacia or contribute to osteoporosis. Sun exposure is a primary source of vitamin D3, as the skin synthesizes it upon exposure to UVB rays from sunlight. Regular, moderate sun exposure can help maintain adequate vitamin D levels.