Typical symptoms of a vitamin D deficiency include fatigue, muscle weakness, and bone pain. Individuals may also experience a compromised immune system, leading to increased susceptibility to infections. Additional symptoms can include mood changes, particularly depression, and a decrease in overall wellness. In children, a deficiency may result in rickets, characterized by soft bones and skeletal deformities. Regular sun exposure, along with dietary sources such as fatty fish and fortified foods, can help maintain adequate vitamin D levels and prevent deficiency-related health issues.