Vitamin D is crucial for bone health and has benefits beyond the skeleton, including preventing chronic diseases. Maintaining optimal vitamin D levels is important, defined as serum 25-hydroxyvitamin D concentrations of 28 to 40 ng/mL. Vitamin D deficiency is prevalent worldwide, with 20% to 80% of people in the US, Canada, and Europe affected. Combating deficiency involves sun exposure, dietary sources, and supplements. Awareness and strategies are needed for adequate vitamin D levels.
