> For the complete documentation index, see [llms.txt](https://docs.beoptimal.ca/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.beoptimal.ca/biomarker-panels/focused-longevity-panel/vitamin-d.md).

# Vitamin D

**Vitamin D** is a crucial nutrient and hormone vital for overall health and plays a significant role in longevity. It supports bone health by aiding calcium absorption and has broader effects, including muscle strength enhancement, inflammation reduction, and immune function improvement. Research indicates that vitamin D influences longevity genes and may impact aging processes and age-related diseases such as cancer, heart disease, and cognitive decline. Vitamin D is also utilized and correlated with immune function. Maintaining adequate vitamin D levels, through sunlight exposure, diet, or supplementation, could be beneficial for extending lifespan and improving health span, underscoring its importance beyond just bone health.